<ul><li>The gear is made of 45# steel, and the surface maybe with rust on some hardened gears.</li><li>Package List: 1pc Spur Gear 1.5M 40Teeth</li><li>Gear inner hole tolerance is positive 0-0.03, with locking hole.</li><li>Batches of different parameters may change slightly, please prevail in kind.</li><li>Links are only the price of the gear, if you need to support the rack, you need to place anther order.</li></ul><br><br>The gear is made of 45# steel, and the surface maybe with rust on some hardened gears.Package List: 1pc Spur Gear 1.5M 40TeethGear inner hole tolerance is positive 0-0.03, with locking hole.Batches of different parameters may change slightly, please prevail in kind.Links are only the price of the gear, if you need to support the rack, you need to place anther order.

VNOIFDE Rack 1.5Mod 40Teeth Spur Gear with Stage Motor Boss/Convex Gear Inner Hole 10mm Pinion Rack Transmission Pinion Gears (Hole Diameter : 10mm)