Here we have the perfect guide with Atlas #305 HO Turntable Manual. HO Scale Manually Operated 9" Diameter Assembled Turntable. FEATURES: Fully assembled 9" diameter turntable has the ability to stop at 21 positions, 15 degrees apart. Smooth manual crank operation; however, it can be easily motorized for remote control operation. Simulated wood brown (with detail) turntable deck and concrete gray pit ring. Lines up with track using 1/4" roadbed. Geneva movement locks table in exact position every time. Nickel silver rail. Expand your model railroad layout into new directions. Instructions included for assembly of manual or motorized operation. INCLUDES: One HO Scale 9" Diameter Manually Operated Turntable REQUIRES: Terminal Sections or Terminal Joiners Flathead Screwdriver Phillips Screwdriver SPECS: Scale: HO 1:87 Diameter: 9" (22.9cm) BOX DIMENSIONS: 11.25" W. X 1.00" H. X 11.25" L. BOX WEIGHT: .83 LBS.