Southern-Pro Retractable Landing Gear by Dave Brown Products. This unit is Precision Built to Aircraft Standards and Designed to Withstand the High Vibration Levels Experienced in today"s High Powered Competition Airplanes. FEATURES: Gears are very reliable in performance (customer will need to select a good 180° retract servo w/3/4" total throw) to power them. Friction-reducing nylon bearing inserts Units are simple and straight forward in operation Designed to operate without lubrication. Gear may be cleaned and washed in tri-clean or methanol. Positive Up and Down lock, wear points hard-anodized for long life. Light-weight black metal templates have (4) 1/8" pre-drilled holes. Retract assembly consists of Black aluminum mounts, small spring, and aluminum pivot block, Black plastic spacers, and steel wire strut which is aprroximately 6-1/4 inches in length and 5/32" diameter. Aluminum mounts have pre-drilled holes for mounting. INCLUDES: Two Main Gear Retract Units One Manual COMMENTS: Customer will want to follow the enclosed diagram & instruction sheet May want to purchase a soft foam rubber pad to provide a cushion for the wheel when it is in the retracted position. REQUIRES: Axles Retract Servo JAK 10/22/98 ir/jl