PYREX® Closures, for Delong neck culture flasks
- Manufactured from either polypropylene or anodised aluminium
- Suitable for use with the PYREX® culture flasks with the plain Delong necks
- The polypropylene closure is a two position cap - open for gaseous exchange or closed for humid environments
- Both closures can be autoclaved
Products

| Catalog No | Closure Material | Closure Size | Quantity | |
|---|---|---|---|---|
| 4540/38P | Polypropylene (PP) | I.D. 38mm | 10 | Find a distributor |
| 4550/38M | Anodised aluminium | I.D. 38mm | 10 | Find a distributor |
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Designed to be used with the PYREX® culture flasks with the plain Delong necks, these push-on closures are available manufactured from either aluminium or polypropylene.
Products
Products

| Catalog No | Closure Material | Closure Size | Quantity | |
|---|---|---|---|---|
| 4540/38P | Polypropylene (PP) | I.D. 38mm | 10 | Find a distributor |
| 4550/38M | Anodised aluminium | I.D. 38mm | 10 | Find a distributor |
Specification
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Product Overview
Designed to be used with the PYREX® culture flasks with the plain Delong necks, these push-on closures are available manufactured from either aluminium or polypropylene.
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