... it hot-selling in the world market, specially in Europe! Aluminum Extension Ladders, 3 layers series:Layer*Step: 3*7; 3*8 ... ; 3*9; 3*10; 3*11; 3*12.Extension Length: 7 steps: 493 cm 8 steps: 576 cm 9 ... in these goods, pls send us e-mail immediately, thanks! Extension Ladder 3L Series