Strechcordz Breakstroke Machine

argent: 3 - 8 lb ( 1.3 - 3.6 kg )
jaune: 5 - 14 lb ( 2.2 - 6.3 kg )
vert: 8 - 24 lb ( 3.6 - 10.8 kg )
rouge: 12 - 31 lb ( 5.4 - 14.1 kg )
bleu : 14 - 34 lb ( 6.3 - 15.4 kg )