Boners Classic Cock Sling Gray from EDC.This cock sling draws attention to your penis and balls by pushing them forward for a provocative look. The sling makes the balls and penis swell up a little, making them bigger and more sensitive. The toy is made of soft and stretchy material for a perfect fit, which makes it comfortable to wear. Clean the cock sling after use with water and toy cleaner for a good hygiene. Measurements:opening penis 3.5 cm inner diameter, 4.5 cm outer diameter e or approximately 1.37 inches, 1.77 inches. Opening balls 4 cm inner diameter, 5 cm outer diameter e or approximately 1.57 inches, 1.96 inches. Video.