This stainless steel anal explorer is perfect for those into medical play who want to expand and stretch open their backdoor! Made out of strong, durable, non-porous, nickel-free steel. It’s compatible with all lubricant types and is nonporous. The Anal Explorer consists of one large ring with a diameter of 4.1 inches and 6 dilators that have smooth rods with small, round, balls on the ends of them. Insert it almost 3 inches deep and spread their hole wide open.