Number of composite molded surprise pistons for two surprise absorbers with six 1.4mm holes & two 1.1mm holes. Two-way motion shock pistons utilize various ways once the piston travels up or down. Because of the synthetic valve setup on piston, 2 holes are closed when piston travels upÂ… appropriate the piston travels down, the valve starts 2 additional holes meaning that your oil strategies through 8 holes all together. This setup allows perfect landings from jumps, despite having a soft shock set-up. Made from specially-formulated composite product to provide smooth action & durability. Well-proven molding procedure guarantees perfect piston roundness after manufacturing, which means that your pistons move totally in the surprise systems for identical shock action in many four shocks.