1) Front layer - marble with thickness of 3mm (±0. 5mm)
2) Base layer- granite, porcelain, aluminum plastic, honeycomb

Product advantages:
1) Anti-erosion: test result: no change from 2H testing immersed in 2% HCL
    solution; no change from 2H testing immersed in saturated Ca(OH)2 
    solutions
2) Sound and heat: insulation: using two different materials, conduction of
    sound and heat is greatly reduced
3) Light weight: 1/3 the weight of pure marble
4) Environment friendly: this ultra-thin composition of marble greatly minimize
    the radiation of normal marble
5) Normal size: 300 x 300/ 300 x 600 / 500 x 500 / 600 x 600 / 400x 800 / 800
    x 800 / 305 x 305 / 407 x 407mm