Specifications:
1) Color: gray (optional)
2) Tolerance:
a) Width and length: -0.4mm - 0.0mm
b) Panel thickness: +0.30mm
c) Level: <0.6mm
3) Sizes: 500 x 500 x 28mm, 600 x 600 x 35mm
4) Weight: approximate 11kg (500mm), 13kg (600mm)

Features:
1) Surface is treated with static painting with good corrosion resistance
2) High precision for dimensions, good interchangeability
3) All steel structure with high strength and strong anti-impact capability
4) Fireproof, waterproof and dustproof
5) Four corners fixed to prevent from sliding
6) Convenient for both assembling and disassembling