It conforms to standard and are free from sand hole,smooth and free from sand holes,blow holes,distortion or any other defects.  

Specification: 
1/,Material: ductile iron manhole cover and frame.  
2/,Manufacturing according to EN 124.  
3/,Shape:round,square,rectangular,triangular. 
4/,Surface finish:black bituminous painting or exposy painting.  
5/,Special size can be produced as drawing.(OEM is acceptable)