This does not fit the Smaller 53/54 Astoria Groups.
Description
This is the Standard Astoria Group Gasket for 58mm Groups. The Original mfr. Part Code is 12217 - this is the Same as that.
Size for Astoria 58mm Gasket: 72mm x 56mm x 8mm (Blue Colour).
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