Hinged segment ringmade from 316L stainless steelwith ahoop design that has a double row along the bottom.Available in size 20G with multiple diamter sizes to choose from: 1/4" (6mm), 9/32" (7mm), 5/16" (8mm), 3/8" (10mm).The hinged design makes this piece easy to insert and remove. Sold individually (1pc).