NAPAOnline.com shows the following:
4S7756 - Seal, .5"; 1.003"; .25" - part # NOS 4984
8S5575 - Seal, .5": .991"; .25" - part # NOS 4943
Kevin
Thanks Kevin, very nice. Unfortunately I think that in Italy only CAT sells these seals.
Seals in inches are rarely used in Italy ... especially with decimals, maybe I can find seals 1/2 "- 1" - 1/4 "but I do not know if they can be fine ..