1. The shell skretch-formed by quality A1-alloy board with plastic sprayed surface; 2. This product with tight structure, graceful shapement, small volume and light weight, corrosion-proof, dustproof and waterproof, etc; 3. Steelpipe and cable wiring; 4. The ballast and ceiling lamp-box can be matched by users choice. 5. Suitable for GB3836-2000、 IEC60079、GB12476.1-2000、IEC61241 standard request.