Plastic Spindle Gear Kit for DIY Car Model Kits - What it is: a 26-piece set of different 5-module spindle gears in multiple sizes and colors, designed as spare parts for hobbyists and DIY projects. - Broad motor compatibility: suitable for hollow-shell motors (130, 140, 180, 260, 280, 370) and various shaft sizes, including 2 mm round shaft, 3 mm D-axis, and 4 mm D-axis motors. - Transmission and propeller gears: includes worm gears 662A and 682A for propellers and transmission slots; bevel gear for transmission; 2A socket functions as axle and motor mounting. - Specs and contents: 26 plastic gears in assorted sizes and colors, plus 10 x 2 mm sockets. - Main shaft gear assortment: white gears (8A, 81A, 81.5A, 82A, 102A, 122A, 132A, 142A, 182A); blue gears (153AD, 152.3A, 15.317A, 154AD); worm models (6x62, 6x8, 62A). Use scenarios - Spare parts for DIY car kits and small RC projects. - Upgrading or repairing gear trains in lightweight robots or educational kits. - Prototyping transmissions and gear ratios for hobbyist experiments.