These 100° Pneumatic Retracts (main gear only) from Robart. FEATURES: Strong steel construction Light weight construction 3/16" tempered steel gear legs Pneumatically operated For .60-.90 size models (5-12 lbs) INCLUDES: Two Pneumatic Retracts Eight 3MM S/T Screws SPECS: Weight (per pair): 6 oz. Retract Mechanism: 1.75" wide x 1.75" long x 1.125" deep Struts: 6.25" long x 3/16" wire REQUIRES: Air control kit (ROBQ2307) *per Robart Hand pump w/gauge (ROBQ2363) Two Robostruts (ROBQ1700) Two Wheels (size and style depends on selected aircraft) Air Line Restrictors (ROBQ2389) Air Line Disconnects (ROBQ2395) JAK 10/13/98 ir/jl