Please note that although the gaskets are strong under compression, you should never use a sharp tool like a screwdriver to install them. This may tear the silicone. The piston V seals for the levers are now blue, they are now a different design to the red seals which will only be used on the Robot from now on. The new blue seals are a bit larger than the red seals. As with any silicone seal, you should only use food safe silicone grease to lubricate them, do not slather it on, a sheen is sufficient. Dow 111 is a good choice. Each piston requires 3 V seals. The V seals are must softer and easier to install than the rubber ones. Item: Modern Lever - Piston V Seal Model: V shape piston Product size: Approx. 49.5mm (OD) 40.5mm (ID) 7.8mm (Thickness) Product weight: Approx. 5g Colour: Blue Material: Silicone rubber SGS food test report: Please click here Installation video: Please click here Machines fit: Please refer to the photo to see examples of the lever groups such as Astoria CMA Bezzera strega BFC: Class Leva Brasilia: Tofino-AL Bosco Fiorenzato C.S: Piazza San Marco Francino: Retro #FCL102 Kees VDW Londinium Quickmill et al Pavoni: Bar, Bart, Hotel, Pub Hotel: Vallelunga Leva Vibiemme Replica Victora Arduino: Athen, Athen-Leva Wega: AL, Antares, Nova Profitec Pro 800 etc. This item is non-refundable. Please check your original gasket size for confirmation. Cafelat UK Limited is not responsible for any incorrect purchase.