Sullivan TigerDrive Adapter 8mm O.S. .12-.21 This is the 8mm O.S. Heavy Duty Tiger Drive adapter This fits most O.S. Max .12 to .21 side exhaust engines, and the Duratrax .18 used in the Nitro Evader. FEATURES Replaces stock pull starter for fast easy probe starts from above Extreme duty bevel gear design Steel plate which attaches to the adapter plate Purple Plastic gear cover German 8mm one-way bearing INCLUDES One Tiger Drive steel plate with overhead bevel gear One bevel gear with German one-way bearing One Copper gasket for back of bevel gear Four 3x12mm cap head screws Four 2.5mmx12mm cap head screws Four 3mmx7mm washers Four 3mmx5mm split washers REQUIREMENTS (7/32 Starter Wand)