Impact Baby Receiver With Mini Ball Head Load Capacity: 6.6 lb, Dimensions: 4 × 2.25 × 1.6", Weight: 3.5 oz, Top Plate Diameter: 1.4", Head Base Diameter: 1.1", With 3/8"-16 to 1/4"-20 Reducer Bushing LIGHTSTANDS-Flash & Umbrella Mounting Accessories