CRUCIBLE HOLDR NPR S4 , Pack of 12.

Details

Neoprene Crucible Holders Filter Adapter^ Size 4 tapered collar-type holders support funnels crucibles and more in vacuum-type filtration assemblies. Holders can be used alone or with adjacent sizes. Positive but easy to release gas-tight seal. 30mm high. 46mm top OD. 28mm bottom OD.