SACKJACK is a dual ballsling and masturbator made from our signature FLEX-TPR so it's super blubbery and soft to the touch. SACKJACK's shaft is lined with nubs and ridges that feel amazing Best of all, SACKJACK's clear frosted color lets you watch all the action. The inside of the ballsling has a ribbed ring designed to grip your balls. FLEX-TPR safe, non-toxic...and phthalate free Stats (Approximate): Cock and Ball Hole Circumference: 6"/ 15.24 cm Shaft Length: 5.5"/ 13.97 Outside Shaft Circumference: 5.5"-7"/ 13.97 - 17.78 cm Inside Shaft Circumference: 3.5"/ 8.89 cm