... which could help heighten, keep fit, lose weight, relieve pressure, strengthen physique, entertainment etc. CZ0834AL--Be made of aluminium. ... 243~265LBS) SpecifictionThe Fly Jumper, in super-strong, gloss-black steel, is the strongest jumping stilts on the market today. Many ... plastic components have been replaced by aluminum and/or steel, resulting in the lightest, strongest, and best performing ...