Product Name: Polymer Resin Square Manhole Cover Model NO.: LR-RB50050040 Certification: ISO, CE Shape: Square Material: SMC Carrying Capacity: 30t Load Level: Heavy Weight: 20kg Trademark: Mingda Transport Package: Standard Export Package Specification: 500*500*40mm Origin: Hebei, China Product Description Mingda offers the leading line of Composite Manholes on the market for use at petroleum retail operations and commercial and industrial driveway applications. Lightweight and durable, our composite covers are available in a wide range of shapes and sizes. From general tank sump access to multiport and single port fill sump applications, to interstitial sumps and monitoring wells, we have every application covered with watertight and easy to remove options. Plus, multiple colors are available!The specification for square manhole coverSpecificationLoad leveld=mmP=mmD=mmh=mmH=mmCarrying capacity1000×1000P-type1000×1000956×9651080×108040522T1000×800P-type1000×800955×7571085×88540535T900×600Heavy600×900550×850690×990506915TP-type600×900550×850690×99040583T860×470Heavy860×470800×410960×570609030T800×800P-type800×800757×757880×88040555T750×450Heavy750×450700×400830×530507325T750×450P-type750×450700×400825×552406210T700×700Heavy700×700660×660788×788506620TP-type700×700667×667770×77050545T600×600Heavy600×600560×560660×660506120TP-type600×600560×560680×68040518T600×400Heavy600×400553×553680×480507520TP-type600×400562×362660×46040618T500×500Heavy500×500466×466566×566506930TP-type500×500460×460560×560404510TLight500×500463×463560×56040452T500×300Light500×300465×265563×36330422T450×840Heavy450×840390×780550×940609040T300×600Heavy300×600240×540400×700609040TProducts show