531-3M-15 D&D Powerdrive 3M Single Replacement Timing BeltOne New Aftermarket 531 3M 15 D&D Powerdrive 3M Single Replacement Timing Belt Manufacturer Part#: 531 3M 15 PACKAGED UOM: 1 EACH TECHNICAL SPECIFICATIONS: Brand: D D Powerdrive, Width(Thick): 15mm, Length: 531mm, No. Of Teeth: 177, Material: Neoprene, Series: 3M, Pitch: 3mm FEATURES & BENE Fits Also called HTD for High Torque Design these belts have metic pitches in millimeters size 3M, 5M, 8M, 14M and 20M Round curvilinear tooth profile increases