Split Collar Rings can be used to help lengthen your ballsack. Each ring is of a heavy stainless steel. You can wear multiple rings to stretch to a length that is comfortable for you - or increase the number of rings as your gradually lengthen your sack. The rings have two bolts that unscrew so that you can easily put them on or take them off - without worrying about getting stuck like you might with a solid ring. These are 1 1/2 Inside diameter and a 2 3/8 inch outer diameter and 9/16 inch wide and weigh approx. 6 Oz. each. They are two piece clamp type.