XLH Xinlehong 9130 9135 9136 9137 9138 Upgrade Metal Spur Gear+Bevel Gear

Features:
Die-casting process, the material is iron, all of which have been oxidized;
The black has been blackened, and at the same time, the hardness can be properly strengthened, and it is not easy to rust;
Silver is nickel-plated, oxidized, not easy to rust;
Their hardness is around 50 degrees.
Harder than zinc powder alloys.
Regarding defects: Because there is a time control in the oxidation process, it will cause the color depth of the gear surface to be different. At the same time, during storage and transportation, gears collide with each other, which may cause scratches on the surface or color loss to varying degrees. But it will not affect the quality of the gear itself.
So if you mind blemishes on the surface of the gear, don't buy it.
Also, regarding installation:
The precision of the large gear and the driving gear is relatively high. When docking for the first time, it may not be very smooth, and precise alignment is required.
Before all gears are shipped, we have personally tested them to ensure that they can be installed before they are shipped.
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So, if the gear is not a quality problem, no refunds will be accepted, thank you.