This is a seal kit for a BREMBO F09 caliper (48mm piston size).
Please do not confuse an F09 caliper with the smaller F08 caliper which have 38mm pistons, or the even smaller F05 caliper which only has 32mm pistons.
This kit includes 2x caliper bolts, 2x piston seals, 2x piston dust seals, 1x o-ring for between the caliper halves and 1x pouch of assembly grease.