1, appearance: composite covers series product appearance smooth, beautiful. Can be colored according to design requirements and design patterns.

Cast iron covers series products easy to rust, corrosion, the appearance of poor results

Cement cover series of products is not smooth, difficult to coloring.

2, weight: composite covers series of light weight products, about cast iron and cement similar products one-third.

3, toughness: composite covers series of good toughness, not easy to crack.

Cast iron covers series of products rigid, lack of toughness, easy to crack.

Cement covers series products are strong, lack of toughness and rigidity, easy to crack.

4, the vehicle to exercise the situation: composite covers series of products with a close combination of seat, balance without war, bounce and so on.

Cast iron covers series products are not close with the seat, the vehicle is easy to bounce when driving, noise.

Cement covers series products are not close with the seat block, the vehicle is easy to bounce when driving, easy to damage.

5, maintenance: composite covers series because of its corrosion-resistant, light weight, coloring, good sealing and so on, easy to identify and open the daily maintenance, effectively reducing the maintenance of labor costs and update costs.

Cast iron covers series of products heavier, easy to rust and corrosion, easy to lose, increase the difficulty of maintenance and update costs.

Cement covers series of products heavier, increased maintenance difficulties.

6, the unit cost: composite covers series product unit cost is lower than 40% of cast iron covers series products, higher than the cement covers series 20%