Hard Nickel Plated Alloy Steel Pinions;These are precision cut gears that last and last;These are best when used with a plastic spur gear

• Robinson Racing Products 8721 Hard Bore 0.8 Module Pinion Gear, 21T, 5mm

Robinson Racing Products 8721 Hard Bore 0.8 Module Pinion Gear, 21T, 5mmHRP (Level 3 Products)