The 1.75" C-Sling is our most constrictive C-Ring, best used by someone who is experienced rings and slings. The diameter has nothing to do with the size of your penis, therefore, the smaller the diameter, the more difficult the ring is to get on, but once on, the more intense it will play. For best results, apply lube to the inside of the ring, then ease one testicle through at a time before finally pulling your shaft through. Easy to clean and store. INCREASE PLEASURE/SENSATION: To use, place a small amount of lubricant on the inside of the sling and slide the sling around the testicles, then the penis. Its contoured tongue should point down and back toward the anus, to gently massage the perineum. SIZE MATTERS: Inner diameter: 1.875"/ 4.76 cm FIRM: Designed to fit snugly around the shaft and testicles, the C-Sling works much like a classic C-Ring. SAFE FOR YOUR BODY: Made from Tantus'' own unique formula of 100% Ultra-Premium Silicone. Not recommended with Silicone Lube. EASY TO CLEAN: Hypoallergenic, Hygienic, Boilable, Bleachable and Dishwasher Safe.