使用優質碳鋼作為原材料,高頻淬火工藝,質量穩定,安全耐用.
High quality high carbon steel as material ,high frequency heat treatment to ensure the steady quality and endurance .
100pcs/box,2000pcs/ctn for 1/2",and 50pcs/box,1000pcs/ctn for 1" ,or as customer's request
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