Replace your Wire Landing Gear Struts with Units that Duplicate the Shock Absorbing Action of Landing Gear on a Real Aircraft. FEATURES: Aircraft Grade Chrome-Moly Steel and Heat Treated Axle. Straight Robostruts have No Offset so Any Size Wheel Will Fit These Give a Scale-Like Appearance to your Airplane. Shock absorbing action smooths out bumps and hard landings. These mount to your existing retracts or fixed landing gear. INCLUDES: One Straight Robostrut One 5/32" Mounting Adapter One 3/16" Mounting Adapter One 3/16" Axle w/E-Clip One Axle Set Screw One Instruction Sheet SPECS: Weight: 1.3 ounce Used for 4-12 pound Airplanes (12 lbs. MAXIMUM per Robart) Diameter: 3/8" Overall Length: 6-1/2"