Mnahole Cover & Manhole Grating 1, Spec: C250 50*50 2, Material: GGG50 3, Class: C250, 4, Standard: EN124 Name: Ductile iron Manhole CoverSpec: C250 50X50Weight: 23 kg ... ) CO.,LTD IS LOCATED IN SHANGHAI,We are a professional manhole cover supplier with 13 years exporting experience.Our customer :WELCOME ...