The Hydromax X20 has the same great features as the Hydromax X30 and X40 but is a little smaller, designed for guys whose penis in no longer than 3.5-6 inches. The Hydromax X20 generates 35% more suction force than the Hercules thanks to its unique, newly designed Bellows Pump system, providing you with better, faster gains. The Bellows system now incorporates a new soft sealing, full support comfort ring to give you reduced pressure and greater comfort around the penis base and testicle region. As an added bonus, it is also removable for ease of cleaning.X20 / X20 Xtreme - Less than 5 inches long and Less than 1.9 inches wide