Round Manhole Cover Material: resin plastic CaCo3 glass fibre Size: 600x50mm/600mmx30mm Any color Round Composite manhole coverItem No.SizeWeightBearing capacityLEKE-60050600mmx50mm41.5kgs50tonsLEKE-60030600mmx30mm17kgs2tonsColor: any color 1. Round manhole covers feature: (1) Environmental protection: non-toxicity raw material (2) Longevity: anti-corrosion, anti-rust, anti-abrasion, excellent ...