This revolutionary design combines recent breakthroughs in vacuum pressure technology and hand-pump enhancements that result in a penis pump with so much power and mega penis-enlarging capacity that we had to include a PSI (pounds per square inch) pressure guage. Featuring a high-quality clear plastic housing with marked measures. Air-tight soft rubber cock ring entry and reassure release valve. Color: Black-Clear Length: ca. 20.8cm Diameter: ca. 6.1cm Material: ABS plastic Silicone Sleeve Pressure Guage Dial Monitors PSI. Easy to use
