This is a pack of four Team Associated Factory Team 12mm Big Bore V2 Flat Screw Mount Shock Pistons. These pistons are left blank so you can drill your own holes and create your own custom piston valving, and the factory machined dimples allow you to position the hole perfectly. They are precision machined to provide a precision fit and finish, and the edges have been radiused for smooth shock action.
NOTE: Screw mount pistons are not compatible with e-clip shock shafts.