piston is part of:

piston contains:

Full expansion for piston:
   100%  Cylindrical Technic Piston Head
   100%  2" Pneumatic Piston
   100%  2x2 Square Technic Piston Head
    80%  2L Technic Piston Crank w/ Axle
    80%  3L Technic Piston Rod w/ Ball & Stud
    50%  2L Technic Piston Rod w/ 2 Side Studs