Rapture Stainless Steel Collar with Nipple Clamps. The collar is polished stainless steel with a magnetic pin connecting clasp. A polished stainless steel chain 12 inches long attaches 2 spring loaded nipple clamps. The tension on the clamps is adjustable. Polished Stainless Steel. Adjustable spring loaded nipple clamps. Circumference 17.75 inches. Diameter 5.75 inches. Height 2 inches. Weight 1.2 pounds.