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Low 48 Teeth Pulley w/bearings (closest to the inner bowl) Pro Machines If your OFEDGE S-4 machineThe Low 48 Teeth Pulley with bearing assembly fits the OF16S L, OF16S H, and the OF16 Pro machine. It also fits the original OF20S L, OF20 S H, OF20 Pro series machines built before April 2015. This pulley has a profile of HTD 1. 5mm and has 48 teeth. The inside diameter is 3 8''.