Also compatible with any E61 type group head. Silicone is a much more durable material and softer which allows for better sealing.
Gaggia Classic *Upgrade* Silicone Group Seal/Gasket, Made in Italy
Rocket / E61 Group Head Drain Sleeve + Sleeve Seal / Gasket - Made In Italy
Gaggia Classic Grouphead Gasket Seal Silicone *Upgrade* Inc shim.
The Rega Red Turntable Drive Belt By Perform (Silicone Upgrade)
Rega Planar 2 / 3 Turntable Motor SUSPENSION Belt NAD 533, SILICONE UPGRADE ????????
Gaggia Classic Grouphead Gasket Seal Silicone *Upgrade* fits Baby/Tebe etc