1), Ductile iron manhole cover & grey iron manhole cover made by SKYHORSE Foundry strictly conform to standard & are free from sand hole.2), Smooth and free from sand holes, blow holes, distortion or any other defects3)Processes:a) Automatic machine linesb) Moulding boardsc) Green sand with hand moulding4), Inscription styles:a) SKYHORSE Foundryb) As per customers' requestsc) Standard inscription5), Inspection:a) Foundry in-houseb) Third party inspection available upon request6), Packing:a) Wooden Palletb) Plywood Palletc) Steel Palletd) As per customers' requirements Other Functions:1Anti-theft:2Load-bearing great:3Corrosion resistent:4 Opens conveniently:5----Superior safety performance:More information is available upon receipt of your inquiry.Qingdao SKYHORSE Industry Co.,LtdTEL:0086-532-8579 6807FAX:0086-532-8825 0718cell:0086-151-5324 0720All inquiry will reply in 24 hours!