(1) Environmental protection
With raw material non-toxicity, it will not influence to user;
(2) Saving mine resource
It is made by regenerated resin or regenerated plastic raw material, which save application of cast iron.
(3) Longevity
Acidalkali and corrosion resistance; Anti-rust; insulation; anti-abrasion; weatherability; excellent anti-pressure capability;
(4) Competitive price
The price of compound manhole cover is lower than stipulated standard cast iron ones;
(5) Light weight
The weight is 1/3 lighter than cast iron ones so that it is convenient to transport, install, rush repair; construct easily and reduce working intensity;
(6) Nice appearance
Outstanding dying, rich colors; the cover is not sprayed in surface but painted in whole material so that the color can keep lasted;
With clean, smooth surface, it will be consistent with the lawn or ground, beautiful and functional;
(7) Anti-theft
Non-recycle, anti-theft naturally; the lock attachment can prevent tunnel products from losing, therefore city blackhole can be stopped totally;
(8) Low noise
Harsh noise and rebounding free when car rolls
