The WINBAG Max packs a powerful 550 lb. (250 kg) of lifting pressure, ideal for those larger projects - leveling windows, installing cabinets, positioning heavy doors and much more. The WINBAG Max includes a longer pump tube of over 1.8m with a suction pad to secure it to a surface. The WINBAG is made from extremely durable fiber reinforced material. It allows for one-hand pumping to inflate the Winbag and a one-handed safety release valve for easy use on site.