Kupo 16mm Adapter for 38mm Female to 38mm Male

The Kupo KS-111 16mm Adapter is a black aluminum and stainless steel fitting, 70mm long and weighing 190g, with a 5/8" (16mm) receiver on one end and a 3/8"-16 female-to-male adapter section on the other. A center hole makes it easy to tighten by hand, and a built-in notch stops it from spinning once connected, letting you bridge 16mm baby-pin equipment with 3/8"-16 threaded gear in either direction.