Book match tv background design black marble slab price for interior background wall

Our quality control system includes automatic detection and manual inspection,we adopting a leading international technology.

We have an experiedced QC team with more than 20 people.They will carefully detect the stone quality and specification piece by piece,
monitoring every production process until packaging is complete,to ensure product safety into container

1)Polished degree:90 degree or up.

2)Thickness tolerance:+/-0.5mm

3)Diagonal tolerance:+/-1mm

4)Surface flatness tolerance:+/-0.3mm

5)Adjacent edge verticality tolerance:+/-0.5mm,Precise Cutting by 

infrared-ray-cut machine.