Martin Blue-Flex™ grid couplings handle high torque levels and high RPM applications in a small package. Unlike other metallic couplings, Martin Blue-Flex™ grid couplings have the ability to reduce vibration and cushion shock loads to driven and driving power transmitting equipment components. Martin Blue-Flex™ couplings are available in sizes 1020-1170 in vertical and horizontal configurations with a rough stock bore. Martin Blue-Flex™ Grid Coupling Assembly, Reboreable, 2.37 to 5 in Bore, 12.13 in OD, 11.98 in Overall Length, 7.03 in OD Hub, 5.87 in Length Through Bore, 121000 in-lb Torque, 2025 RPM Maximum, 177 HP Power, Steel, 12.13 in H Dimensions