ITEM NO.:CB-EL308
PRODUCT SIZE:87*154*346.5CM
PACKING:SHRINK BAG
PACKING SIZE:48*17*226CM
N.W/G.W:11.8/12.0KGS
20FT/40FT/40HQ:168/336/379PCS

STONG POINTS:
1.ALUMINUM THICKNESS IS 1.2MM,THICKER THAN OTHER 1.0MM
2.HAVE LIMIT PIN TO FIX THE LADDER HEIGHT AND KEEP THE EXTEND LADDER MORE STABLE
3.SAFETY CATCH AND LIMIT PIN QUALITY IS VERY DEAR,HIGH QUALITY MATERIAL
4.THE WIDTH OF ALUMIMUM TUPE IS WIDER THAN OTHER SUPPLIERS

You can look over better from the picture.
And our all ladder have EN131 Certification.
The Extension Ladder can be used as a Simple,Extension or double ladder,usefully.