Leather piston cup seals 1 inch (25.4 mm). This is a standard Leather cup seal. Leather naturally varies in thickness, however, these seals are made to very close tolerances. They will expand a little to fit an out of round or oversized compression tube or can be reduced in diameter with sand paper and made to fit a slightly undersized compression cylinder. Therefore, you can use them to replace 25 and 26 mm piston seals. You might need to purchase LEA1A to accompany this seal.
