Number of layers (specification):

Thick large square tube three-layer three-mesh

Thick large square tube three layers two mesh one board

Thick large square tube three layers one mesh two plates

Thick large square tube four-layer four-mesh

Thick large square tube four-layer three mesh one board

Thick large square tube four-layer two-mesh two-board

Thick large square tube four-layer one mesh three-board

Thick large square tube five layers five mesh

Thick large square tube five-layer four mesh one board

Thick large square tube five-layer three mesh two board

Thick large square tube five-layer two-mesh three-board

Thick large square tube five layers one mesh four plates

Thickened extra large square tube three-layer three-mesh

Extra large thick square tube three layers two mesh one board

Extra large thick square tube three layers one mesh two plates

Extra large thick square tube four-layer four mesh

Extra large thick square tube four layers three mesh one board

Extra large thick square tube four layer two mesh two board

Extra large thick square tube four-layer one mesh three-board

Extra large thick square tube five layers five mesh

Extra large thick square tube five layers four mesh one board

Extra large thick square tube five-layer three mesh two board

Extra large thick square tube five layers two mesh three board

Extra large thick square tube five layers one mesh four plates