Protective collars, EPDM. For filter flasks. Special design centres the funnel and flask and provides stable support for funnels, filters and manifolds placed on them. A clean seal is made between the flask rim and container placed on it. Application of the vacuum provides a tight seal. Also provides all-round protection for glass filter flask rims, significantly reducing impact damage and extending working life.
Product Specification: Diam.: 68 mm Height: 25 mm For bottles: 5000, 10000 ml
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