Turntable 7-1/2" Diameter Atlas N ScaleDetails: When you have a larger layout you need a way to get all the cars around so this Atlas N Turntable 7 1 2" Diameter #2790 is perfect for your layout. Fill it up and start connecting the cars to your N Scale locomotive. N Scale manually operated turntable by Atlas Model Railroad Co. FEATURES: 7 1 2" diameter turntable deck Smooth operation. 21 track positions. 15 degree stall spacing. Geneva movement locks table in exact position every time.