Enjoy an intense blowjob-like simulation with the incredible Suck N' Stroke Head Pump. This easy-to-use tip stimulator creates a powerful suction action that stimulates the sensitive nerve endings under and around the head of your penis. With each squeeze of the medical-style pump ball, the soft rubber sleeve clings to your member and slides up and down with each pump. First choose a ring size, slide the ring over the sleeve, fold the sleeve over the pump cylinder, and enjoy a tight seal around your head. Be sure to use plenty of Moist® lubricant for an extra wet, extra wild encounter! Perfect for beginners! Intense suction similar to a blowjob Made to play hard Includes: Medical style PVC balloon pump Super Elastic PVC Pump Sleeve High strength ABS cylinder Transparent and resistant vacuum tube (3) Graduated Silicone Penis Rings Balloon pump dimensions: Width/Depth: 2.09" (53.29 mm) Height: 3.13" (79.66 mm) Sleeve dimensions: Length: 4.9" (124.65 mm) Width: 2.3" (58.53 mm) Depth: 0.1" (2.77 mm) Cylinder dimensions: Length: 3.22" (81.79 mm) Width/Diameter: 2.07" (52.7 mm) Depth: 0.08" (2.09 mm) Tube dimensions: Length: 17.5" (44.4 cm) Width/Diameter: 0.23" (5.87 mm) Depth: 0.06" (1.64 mm) Cock ring diameters: Small: 1.2" (30mm) Medium: 1.6" (40 mm) Large: 2" (50 mm)