Selling new Contender as I am cleaning up my cages. Contender Base Ring (inner diameter): 1-3/4 inches Base Ring Shape: Round Ring to Cage Gap: 3/8 inch Cage Ring (inner diameter): 1-3/8 inches Flaccid Length: 2 inches Lock Style: Security Screw Heart Shaped Key/Pendant: Heart Key (optional). Bought for 402 EUR total. Selling for 350 EUR (EU shipping included).