This spigot is 4.72"(120mm) long, once fitted in a mafer clamp, it gives 3.66"(93mm) extension. One end is 5/8"(16mm) Hex Stud, which can fit in a convi clamp steadily, and the other end is 5/8"(16mm) Baby Pin, perfect for mouting with flash lights, LED lights, strobes, softboxes and other photography studio video camera lighting with baby receiver. Specifications: Material: Aluminum Alloy Net Weight: 2.0ounce / 57g Length: 4.72" / 120mm Structure: One end is 5/8"(16mm) Hex Stud, another end is 5/8"(16mm) Baby Pin