These balls are made by Solid Stainless Steel, these are Heavy, smooth, round and high quality polished. These are compatible and threaded for our all Cockrings with anal balls, Bondage hooks and Insertiable Stick Sizes: 20mm , 30mm, 40mm, 45mm, 50mm, 55mm, 60mm, 70mm, 80mm, 90mm, 100mm.
