With safety in mind Propel trampolines will bring hours of outdoor bouncing fun and exercise for your children. Whether it s a warm summer morning or a day after school it is sure to provide hours of satisfaction and delight. The Propel 10 round trampoline with safety enclosure is one of the safest bounciest trampolines on the market. With an ultra-smooth bounce controlled by 54 galvanized steel springs the Impact-Absorbent Enclosure System and a thick Sure-Lock safety pad Propel Trampolines reach the paramount of safety. Each trampoline is engineered with steel joint brackets to speed up assembly and increase stability