150-S4.5M-284 D&D Powerdrive S4.5M Single STS Replacement Timing Belt
Of Teeth: 63, Material: Neoprene, Series: S4.5M, Pitch: 4.5mm. STS or Super Torque timing belts have a modified curvilinear(round) tooth profile which enables them to transmit greater loads then HTD timing belts.