Ship manhole cover for sale

Product Description
 1.advantage of  marine manhole cover 
   1) High load rating and strength
   2) Against theft and safety options
   3) Durable service life.
   4) Free design
2.detailed information of  marine manhole cover
1) Various manhole cover supplied by TRUST strictly conform to standardand free from sand holes,
blowholes,distortion or any other defects
2) Processes:
      a) Automatic machine lines
      b) Moulding boards
      c) Green sand with hand moulding
3) Guarantee: TRUST will replace any heavy duty castings that have been properly installed and broken in normal use, free of charge after receipt of the broken castings.
3.size