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Product Origin:China
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Description:Features: 1) Competitive price 2) Good quality 3) Prompt delivery 4) Diameter and pitch a) 6mm, 4:1 b) 8mm, 4:1 c) 10mm, 4:1 d) 12mm, 4:1 e) 14mm, 4:1 f) 16mm, 4:1 g) 18mm, 4:1 h) 20mm, 4:1 i) 22mm, 4:1 j) 24mm, 4:1