PRODUCT
Home & Garden > Ventilation
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DESCRIPTION
The Cogwheels are made in a set to drive the chains rolling in the actuators.
Materal: JIS/SCM 415 with Carbonization, AISI 1215MS with Carbonization
Heat treatment: Carbon Nitrade Hardness, HRA78~ 83 degree
Surface Finish: Zince Plating comply with ROHS