Stay abreast of the new and best ways to play, with the UberKinky Airlock Breast Enlargement Pump! This supreme cylinder is made from top quality, durable material that is built to last. It is ergonomically designed with rounded edges for a quick and easy seal, and is cleverly contoured so that it sits perfectly over your breast. Simply attach your pump and apply the desired pressure. Once reached, you can disconnect the pump and leave the cylinder in place. That sensational suction feels simply incredible and provides unrivalled intensity. All you need is a little bit of lube to create the optimum seal. After you've pumped to perfection, you can press the air release valve and remove. From there, it is up to you how you play; sadistic sensation play, brutal BDSM play or superior sex play. Remember, you must purchase a vacuum pump separately; we wouldn't want you making any boobs! Circumference Small: 33.28cm (13.10 inches) Medium: 38cm (15 inches), Large: 44cm (17.32 inches), X Large: 48cm (18.9 inches), XX Large: 62cm (24.4 inches) Inner Diameter Small: 8.38cm (3.3 inches), Medium: 9.58cm (3.77 inches), Large: 11.2cm (4.4 inches), X Large: 12.72cm (5 inches), XX Large 17.25cm (6.8 inches) Insertable Length Small: 7.62cm (3 inches), Medium: 9.5cm (3.74 inches), Large: 10cm (3.9 inches), X Large: 14.5cm (5.7 inches) XX Large: 14cm (5.5 inches) Overall Diameter Small: 10.6cm (4.17 inches), Medium: 11.97cm (4.7 inches), Large: 14.2cm (5.6 inches), X Large: 15cm (5.9 inches) XX Large: 20.5cm (8 inches) Controller To be used with a hand held pump Contents 1 cylinder Does Not Come With Hand pump Does Not Include Latex, Phthalates Colour Transparent Material Polycarbonate