1. Column: Outside diameter: 10*10* 1.3cm, built-in 8*8CM* 1.8mm galvanized pipe. It is made of steel-lined PVC composite material (plastic wood for short), with smooth surface, no rust, uv resistance, uniform and gorgeous color, no cracking and no smell. 2. Platform: Plastic wood 3*9* 0.7cm, smooth surface, no rust, uv resistance, uniform and gorgeous color, no cracking, no smell. 3. Steel pipe: high quality galvanized pipe, surface powder spraying treatment. 4. Hardware: 304 stainless steel. 5. Plastic parts: using imported food-grade engineering plastics, the pigment will be completely dissolved into the particles through granulating process, grinding machine processing, rolling plastic molding process, colorful, anti-static, anti-decolorizing elements, safety, environmental protection, not easy aging; 6. Decoration: PE plate material, not fading, not easy to aging. 7. Functional requirements: double sliding, S sliding, single sliding, climbing, drilling bucket, net climbing, stairs, decorative small pieces, using modular connection.