Group of composite molded shock pistons for 2 shock absorbers with eight 1.3mm holes & two 1.2mm holes. Two-way movement shock pistons work with other ways following the piston travels up or down. Utilising the synthetic valve arranged inside piston, 2 holes are closed whenever piston travels upÂ… appropriate the piston travels down, the valve begins 2 extra holes thin oil strategies through 10 holes in general. This setup allows perfect landings from jumps, despite having a soft shock set-up. Made of specially-formulated composite item in order to make smooth action & durability. Well-proven molding procedure ensures perfect piston roundness after production, which means your pistons move perfectly in shock figures for identical surprise action in most four shocks.