Loading weight is up to 220lbs (100kg) Fits tubes 48mm-51mm Equipped with a 5/8in (16mm) baby pin for lightweight luminaires The thread is captive for preventing the wing nut from falling off Constructed from high tensile aluminum extrusion This lightweight coupler is equipped with a 5/8in (16mm) stud for lightweight luminaires. It is constructed by high-tensile aluminum extrusion and has been developed for installations where load capacities of up to 220lbs (100kg) are required. Fits tube dia: 48mm-51mm. Specifications Weight: 0.97lb / 0.44kg Color: SIlver Product Height (in): 1.18in Product Height (cm): 3.0cm Product Length (in): 7.68in Product Length (cm): 19.5cm Product Width (in): 4.53in Product Width (cm): 11.5cm Product Weight (lb): 0.97lb Product Weight (kg): 0.44kg Maximum Payload Capacity (lb): 165.2lb Maximum Payload Capacity (kg): 75.0kg Maximum Jaw Diameter (in): 2.01in Minimum Jaw Diameter (in): 1.89in Maximum Jaw Diameter (mm): 51.0mm Minimum Jaw Diameter (mm): 48.0mm Stand Adapter Type: 16mm Baby Pin Primary Material: Aluminum Secondary Material: Steel Warranty: Limited Two-Year Warranty