1. High Quality with Reasonable Price 2. ISO9001 Certificate 3. Prompt Delivery 4. ... Iron: - Grey Cast Iron Types: GG15 ,GG20, GG23, GG25 ,GG30 - Ductile Cast Iron Types: GGG40, GGG50, GGG60, GGG70, GGG80, GGG90Shape: Round ... Demand! Any inquiry, pls don't hesitate to contact us! High Quality Ductile Iron/Grey Iron Manhole Cover