ACON Air 13 Sport HD Performance Rectangular Trampoline with Net and LadderStretch Your Limits with the Acon Performance Kit The Air 13 HD Trampoline Package with Performance Kit is Acon elevation at its highest. With new Piano Wire Springs, the best bounce in the business gets extreme. Performance, All in One Package includes the signature Air 13 Sport HD trampoline, 2 sets of springs (Piano Wire and Air series), performance pole sleeves, gear bag and branded stickers. Acon Innovation Our safety skirt fits over the springs