PTFE Sealing Gasket for 1/2" Fittings, Multi-Brand Fit A 1/2" PTFE gasket that crosses over an unusually wide range of commercial machines, from Ascaso and Astoria to Marzocco, Vibiemme and Wega. PTFE won't compress-set or degrade from hot water the way rubber gaskets eventually do, which is why it's the OEM choice across so many brands for this fitting size. SPECIFICATIONS 26 x 21 x 2 mm, PTFE COMPATIBILITY Fits: 1/2" threaded fittings across many commercial espresso platforms Replaces: Ascaso F.1854/I.4996, Astoria CMA 27421009, Bezzera 7479960, Bianchi 43143129, Brasilia 00812.0.00.02, ECM C469900783, Expobar CTAV1-07, Faema 4701136006, Fiamma RST 5.0.016.0106, Fiorenzato A1200154, Grimac GR743/GR746, Isomac ISGUATF26212, LF 1186117, Marzocco H.2.004, Reneka AT7479960, Scala C-0407, Vibiemme GUARTE/GUARTEFNIPCAE, Wega WY27421009 INSTALLATION Standard fitting reseal, hand-tight plus a wrench quarter-turn is typically enough; PTFE doesn't need the extra crush that rubber gaskets do. PRO TIPS Because PTFE doesn't compress the way rubber does, over-tightening won't get you a better seal, it just deforms the gasket. If a fitting is still weeping after snugging it down, the sealing faces themselves are likely nicked or out of round, not the gasket.