Rectangular manhole cover and frame

Specification: 
1/,Metarial:Ductile iron. 
2/,Standard:A15,B125,C250,D400,E600,F900 as EN124.
3/,Type:round,square,rectangular.
4/,Certificate:ISO9001:2008,SGS,BV. 
5/,We can also produce as clients' drawing.
At present we have exported a lot to Iraq.