Product Description Specifications Documentation Motor HW Kit for P7 gearboxes with a first stage of 4:1 and a RS-5nn sized motor (RS-540, RS-545, RS-550, RS-555, etc).This kit contains a pinion, 2 screws, and 2 lock washers. This kit does not contain a motor input block. For Motor: RS-5nn (RS-540, RS-545, RS-550, RS-555, etc) Pinion: P7 Pinion, First Stage 4:1, 3.2mm Shaft, RS-5nn Motor Screws: Two M3 x 8 screws Lock Washers: Two M3 Click arrow in center of image to load and interact with it Your browser does not support iframes.