These are the #150 Robart Giant Scale 100° Rotating Retracts. FEATURES: Ideal for use in 1/5 scale models such as the F4-U Corsair, P-40 Warhawk, F6F Hellcat and AD-1 Skyraider Struts rotate 90° when retracted Aircraft grade steel and aluminum components Positive up-locks, functional steel oleo struts, triple sealed 5/8" diameter air cylinder and 1/4" axles INCLUDES: Assembled Left and Right Strut Assemblies with Parts List REQUIRES: Robart Air Control Kit ROBQ2302 or ROBQ2307 jxs 05/20/10 ir/jxs