ITEM NAME:21T 55021 for Holmes Hobbies TrailMaster Sport 550 HO/110100046 Brushed Mot D4Y9 21T 55021 for Holmes Hobbies TrailMaster Sport 550 HO/110100046 Brushed Mot D4Y9 Zero timing, universal installation and rotation direction 1/8th inch shaft diameter 36mm OD x 57mm length (not including shaft) m3 mount holes, 25mm spacing, "540" standard ball bearing on output side bronze bushing on end bell side High strength Y45 Ferrite magnets Color: green + black material: metal Package List: 1pcs * 21T Motor
