This is a Left Offset Main Gear Robostrut for 4 to 12 pound Sport, Scale, orJet Aircraft. It Duplicates the Shock Absorbing Action of Full Scale LandingGear. Smooths out Bumps or Hard Landings, Improves Ground Tracking and Protectsyour Valuable Radio Gear from Shock Damage.FEATURES: Aircraft Grade Chrome-Moly Steel Construction Pre-Primed Gray Heat Treated Axle and Functional Torque Link Shock Absorber P-51 Style Offset Strut Low Weight of Only 1lb 1.3oz Each Can be Retrofitted to Most Retract Systems Scale or Semi-Scale in Appearance Replaces Wire Landing GearINCLUDES: One 653L Left Offset Main Gear Strut Two 5/32" Adapter Bushings for Wire Struts Two 3/16" Adapter Bushings for Wire Struts Two 3/16" Diameter Axles w/E-Clip Four 4-40 Set ScrewsREQUIRES: One 3" to 3-1/4" Sized Wheel Low Heat Solder or JB Weld (to secure the adapter bushing) Threadlocking Compound (for securing set screws) Tools for AssemblyCOMMENTS: The Right Offset Strut to match this one is ROBQ1706.RobartPart ROB653L