(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 roll