Lightweight and low profile professional coupler, developed for installations where load capacities of up to 330lbs (150kg) are required. TUV approval, with M12 hex head bolt as standard. The double level's counter sunk for M10 or M12 hex head bolt. Easily accessible and ergonomic horizontal handle for faster coupling Fits O.D. 38-51mm tube Constructed by aluminum gravity casting - SWL: 330lbs (150kg) - Black Finish The Arch Coupler is a lightweight and low profile professional coupler, constructed from high tensile aluminum extrusion. It has been developed for installations where load capacities of up to 330lbs (150kg) are required. The KUPO professional couplers combine strength and durability with a high degree of safety. The Arch Coupler is designed to fit tubes with diameters between 38mm-51mm. It has double levels counter and sunk for M10 or M12 hex for customer solutions. It has a black anodized finish. Specifications Weight: 1.52lb / 0.69kg Color: Black Product Height (in): 1.59in Product Height (cm): 4.03cm Product Length (in): 5.67in Product Length (cm): 14.4cm Product Width (in): 5.1in Product Width (cm): 12.95cm Product Weight (lb): 1.52lb Product Weight (kg): 0.69kg Maximum Payload Capacity (lb): 330.0lb Maximum Payload Capacity (kg): 150.0kg Maximum Jaw Diameter (in): in Minimum Jaw Diameter (in): 1.5in Maximum Jaw Diameter (mm): 51.0mm Minimum Jaw Diameter (mm): 38.0mm Primary Material: Aluminum Warranty: Limited Two-Year Warranty