Advanced Silicone Pump Sleeve Smoke. Heavy duty, high quality, Silicone pump sleeves make a great addition to any penis pump. Sleeve fits up to 3 inches diameter pump cylinder. Penis pumps sold separately. Safe and pure for body and pleasure. Made using phthalate free, non-toxic materials Silicone. Sleeve measures 3 inches long by 1.25 inches wide. Always clean before and after use plus between partners. Advanced Silicone Pump Sleeve is a registered trademark for California Exotic Novelties.