When Silca relaunched out of the US 11 years ago it was with small replacement parts to get pumps working again. Like this brass inner valve assembly. If you have a SILCA PISTA made since 1946, a SUPERPISTA since 1989, or any of the Impero Frame Pumps since 2015, it has a check valve assembly like this to ensure that air can only go in one direction. Selling these small parts allowed us to build up to eventually making new pumps, and onto wax and lubricants. We might be more known for wax these days, we still offer these small parts so our customer can restore and rebuild instead of re-buy.