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Flasks, round bottom, narrow or wide neck, with flared rim, DURAN®

Supplier: DWK Life Sciences
DURAN®, borosilicate glass 3.3, clear.

  • Very good chemical resistance
  • High temperature resistance
  • Minimal thermal expansion, giving relatively high resistance to temperature changes

Marked with capacity and a white labelling area. Flasks with neck external diameter larger than 65 mm have reinforced rims.

*Non-DIN ISO size

Certifications: DIN ISO 1773 (narrow neck)
DIN EN ISO 24450 (wide neck)



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Narrow neck
Capacity Height Ø ext. Neck Ø ext. Pk VWR Catalog Number Quantity
50 ml 95 mm 51 mm 26 mm 1 214-2105
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100 ml 110 mm 64 mm 26 mm 1 214-2110
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250 ml 144 mm 85 mm 34 mm 1 214-2115
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500 ml 168 mm 105 mm 34 mm 1 214-2120
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1000 ml 200 mm 131 mm 42 mm 1 214-2125
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2000* ml 260 mm 166 mm 42 mm 1 214-2130
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3000* ml 260 mm 185 mm 50 mm 1 214-2135
4000 ml 290 mm 207 mm 52 mm 1 214-0146
5000* ml 305 mm 223 mm 50 mm 1 214-2145
6000* ml 355 mm 236 mm 51 mm 1 214-2150
10000 ml 380 mm 279 mm 65 mm 1 214-2155
12000* ml 380 mm 295 mm 65 mm 1 214-0427
20000* ml 515 mm 345 mm 76 mm 1 214-2160

Wide neck
Capacity Height Ø ext. Neck Ø ext. Pk VWR Catalog Number Quantity
50 ml 105 mm 51 mm 34 mm 1 214-2205
100 ml 110 mm 64 mm 35 mm 1 214-2210
250 ml 143 mm 85 mm 51 mm 1 214-2215
500 ml 168 mm 105 mm 50 mm 1 214-2220
1000 ml 200 mm 131 mm 50 mm 1 214-2225
2000 ml 240 mm 165 mm 76 mm 1 214-2231
2000* ml 240 mm 166 mm 50 mm 1 214-2230
3000* ml 260 mm 185 mm 65 mm 1 214-2235
4000 ml 290 mm 206 mm 76 mm 1 214-2240
5000* ml 310 mm 223 mm 65 mm 1 214-2245
6000 ml 330 mm 236 mm 89 mm 1 214-2251
6000* ml 330 mm 236 mm 65 mm 1 214-2250
10000* ml 420 mm 279 mm 89 mm 1 214-2255
20000* ml 520 mm 345 mm 89 mm 1 214-2260

Cork rings for round bottom flasks
For Ø ext. Pk VWR Catalog Number Quantity
10 - 100 ml flasks 80 mm 5 217-1000
250 - 500 ml flasks 110 mm 5 217-1001
500 - 1000 ml flasks 140 mm 3 217-1002
2000 ml flasks 170 mm 3 217-1003
4000 ml flasks 210 mm 2 217-1004
6000 ml flasks 240 mm 2 217-1005
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Terms & Conditions

These terms and conditions cover all sales of products and services by VWR Lab Products Private Limited(VWR) in India and any information and advice given whether charged for or not. No variation in these terms and conditions will apply unless agreed by VWR in writing. Orders are accepted only on the condition that no conditions of purchase shall apply. 


VWR has the right to change the prices shown in catalogues and price lists at any time and to invoice at prices current at the date of receipt of an order.

‘Price on application’ (POA) quotations and all other quotations will be valid for 30 days (provided there is no change in Custom Tariff) from the date of the quotation, unless otherwise notified by VWR.

All prices in catalogues and quotations are exclusive of Value Added Tax and any other taxes or duties. These will be charged separately, if applicable. VWR reserve the right to apply a freight charge on all deliveries. 


Unless otherwise agreed in writing payment terms are full in Advance. VWR has the right to charge interest on all overdue sums at the rate of twenty four percent per annum .

  • Any claims for shortages must be made within 7 days of a delivery.  
  • Any claims for non-ordered items or non delivery must be made within 7 days of receiving the invoice. 
Return of Damaged or Unsuitable Goods

No goods may be returned to VWR without the authorisation of VWR.

Authorisation to return products damaged during delivery must be requested within 3 days of delivery. VWR has the right to repair and return damaged products.

Authorisation for the return of products which fail to meet current published manufacturers specifications must be requested in writing within 28 days of delivery. VWR will assist customers, at customers’ expense, to obtain any manufacturer’s warranty consistent with that granted to VWR.

Authorisation for the return of products, other than those damaged during delivery, delivered in error or those that do not meet specification, must be requested within 10 days of delivery. Credit (less a handling charge of 15% of the invoice value of all products returned subject to a minimum charge of INR 5,000) will be given for those products authorised for return which are unused and in re-saleable condition other than those in the categories shown:

  • open chemicals or diagnostics
  • refrigerated or other perishables
  • items with an expired shelf life or an expiration date too short for resale
  • any article that has been delivered direct by a third party supplier
  • discontinued items
  • items not purchased from VWR.

Authorisation will be subject to the condition that the products are returned to VWR Customer Service Centre or to the manufacturer or other source notified by VWR, by registered post if permitted, (for which VWR will supply a label) , for which a handling charge will be made for each line.

Articles that have been delivered on our behalf by a third party supplier will not be accepted back at the VWR Customer Service Centre.

Health, Safety and Liability

Risk in products will pass at the time of delivery to the customer.

The customer is responsible for unloading and transporting large and/or heavy items from delivery vans.

In view of the hazards of certain chemicals and apparatus the customer must ensure that the products purchased are in a safe condition and that a safe system of work is in place taking into account all available information. None of the products sold are intended for human consumption unless otherwise clearly stated.

In view of the wide range of uses of chemicals and apparatus, the customer will be solely responsible for determining the suitability and specification of products, services, information and advice for its purposes. VWR has the right, without notice, to supply product of different specifications, sources, and pack size to that published or ordered. The customer is required to ensure that that the use of any products supplied by VWR do not infringe third party intellectual property rights.

In view of the above, liability of VWR for any loss or damage suffered by a customer and arising by reason of defects in the products or otherwise howsoever is limited to the invoice price of the products in respect of or in relation to which loss or damage is claimed. Any liability accepted by VWR under these terms and conditions is in lieu of any warranty or condition implied by law as to the quality or fitness for any particular purpose of the products and save as provided in these terms and conditions VWR will not be under any liability, whether in contract, tort, breach of statutory duty or otherwise in respect of defects in products delivered or for any injury (other than death or personal injury caused by VWR negligence as defined in any applicable act) damage or loss resulting from such defects or from any information, service or advice provided by VWR or its employees, contractors or agents. In no event shall VWR be liable for any consequential loss whether or not resulting from force majeure. The customer indemnifies VWR against any claims from its employees, contractors or agents.

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