Directions of use the top ring is striped over the hard penis and the cuff is tightened. after that you pull the second loop over the testicles and the lower cuff is tightened strong so there is no pain and the testicles do not turn blue (tighten by feel - risk of congestion of the veins). after that the aluminium-plug is inserted in the anus. caution: you should tighten the cuff careful so that the skin is not pinched.rubber cord:ø 5 mm, black round cord made of nbr-elastomer (nitrile), very resistant against oils, gasoline and heat. it has a hardness of 70 shores, a-quality, high strength and elasticity.aluminium cuff/ - plug:these noble cuff and plug (ø max. approx. 3.50 cm/ 1.38 inches, length: approx. 8.90 cm/ 3.50 inches) are made of highly polished hard-aluminum. cleaninguse a disinfectant for cleaning such as malesation cleaner for toys & body.precautionsdo not use longer than 30 minutes. wait at least 60 minutes between two applications. do not fall asleep with the cock ring. please read printed product information / instructions for use and warnings (attention!) In the package.