Multifunctional folding joint herringbone ladder

One word 2.5 meters A word 1.2 meters standard 4×2, One word 3.6 meters A word 1.7 meters standard 4×3, One word 4.7 meters A word 2.3 meters standard 4×4, One word 5.8 meters A word 2.8 meters standard 4×5, One word 3.6 meters A word 1.7 meters thick 4×3, One word 4.7 meters A word 2.3 meters thick 4×4, One word 5.8 meters A word 2.8 meters thick 4×5, One word 6.9 meters A word 3.3 meters thick 4×6, Iron plate can be sold separately, Standard four-fold herringbone 1.8 meters straight ladder 3.7, Standard four-fold herringbone 2.3 meters is not recommended for straight ladders 4.8, Standard four-fold herringbone 2.8 meters is not recommended for straight ladders 5.8, Thickened four-fold herringbone 1.8 meters straight ladder 3.7, Thickened four-fold herringbone 2.3 meters straight ladder 4.8, Thickened four-fold herringbone 2.8 meters straight ladder 5.8, Thickened four-fold herringbone 3.4 meters is not recommended for straight ladders of 7 meters, Thickened four-fold herringbone 3.9 meters is not recommended for straight ladders of 8 meters