Simplex / Duplex Roller Chain 04C 06A 08B 10A-40B Full & Half Connecting Link. 04C-1 06C-1. 06B-2 08B-2 10B-2 12B-2 16B-2 20B-2 24B-2 28B-2 32B-2 40B-2. Type: Duplex Roller Chain with full connecting links，Duplex Roller Chain with half connecting links，Simplex Roller Chain with full connecting links，Simplex Roller Chain with half connecting links，.
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