Chemistry filter adapter is used for reduced pressure filtration with plain stem buchner funnels. Top has a HEAVY DUTY tooled flare to accept the listed size pluro stopper. Hose connection is 10mm OD at the largest serration. ADAPTER IS NOT SUPPLIED WITH RUBBER PLURO STOPPER. CG-1052-A-14 Accepts up to 60mL plain stem Buchner Funnels. CG-1052-A-24 Accepts up to 150mL plain stem Buchner Funnels.