This is the Robart Tri Gear Retract Set for the Top Flite Cessna 310, TOPA0910. FEATURES: Steel and aluminum construction INCLUDES: Nose gear and two main gear assemblies, parts lists and instructions REQUIRES: Standard Air Kit, ROBQ2302 Pressure Tubing, ROBQ2369 Air Line Quick Disconnects, ROBQ2395 SPECS: Main Gear Retracts Length Between Mounting Hole Centers: 1.8" (45mm) Width Between Mounting Hole Centers: 1.5" (39mm) Mounting Bracket Height: 1.4" (35mm) Strut Length Below Bracket: 5.8" (148mm) Nose Gear Retract Length Between Mounting Hole Centers: 1.8" (45mm) Width Between Mounting Hole Centers: 1.5" (39mm) Mounting Bracket Height: 1.4" (35mm) Strut Length Below Bracket: 6.1" (156mm) jxs 01/16/07 ir/jxs