PTFE Heating Element Gasket, 50 mm Flat PTFE gasket originally designed for Gaggia Italia equipment, and also suitable for Astoria boosted boiler elements as well as Carimali, La San Marco, and La Spaziale heating elements. SPECIFICATIONS Size: ø 50 x 40 x 2 mm Material: PTFE COMPATIBILITY Fits: Gaggia Italia heating elements Works with: Astoria boosted boiler elements, Carimali, La San Marco, and La Spaziale heating elements INSTALLATION Involves working inside the boiler around the heating element and mains wiring, so a qualified technician is recommended. PRO TIPS PTFE gaskets take a compression set once torqued down and heat-cycled, always fit a new gasket when you pull a heating element rather than reusing the old one, even if it looks intact. No sealant or thread-locker is needed on a PTFE flat gasket; over-tightening the retaining nut is more likely to cause a leak (by deforming the gasket unevenly) than under-tightening.