12 FT Trampoline is equipt with 8 high safety enclosure poles and heavy gauge galvanized rust resistance steel construction. 4 W-shaped legs secure stability. 8 foam padded poles to support UV-proof safety trampoline enclosure net for maximum safety while jumping. Heavy duty 3-step galvanized steel ladder offers convenient maneuverability in and out of the trampoline. Our trampolines comply with ASTM F381-16 and ASTM F2225-15 Standard Safety Specification for Components, Assembly, Use, and Labeling of Trampolines. You can rest assured that our safety materials are among the best on the market for your family.One order gets all accessories .The specific assembly steps are shown in picture form which is easy for you to understand. This trampoline comes in 1 large box, if the box arrives damaged or parts missing, contact us and we will reply in time.