dn500 manhole cover with design temperature

{"cid":"91224153","title":"Carbon Steel One-button Quick Opening Manhole Cover with Design Temperature -20- 140 and Modified Rubber Seal Material","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/25\/02\/0ffb00f94cd277abd4bb332ced2d-200x200-1.jpg","attrs":{"Price":"$150\/pieces 1-9 pieces","Brand Name":"CHUANCHU","Model Number":"HT_YJSRKG_520","Minimum Order Quantity":"1","Delivery Time":"7-30 days","pump":"\/","Material":"Carbon Steel","Power":"\/","Accuracy":"\/","Nozzle":"\/","ambient temperature":"\/","Place of Origin":"Hubei, China","Working Voltage":"\\","Flow Rate":"\\","Warranty":"1 Year","Certificate":"\\","Type":"manhole cover","Nominal diameter":"DN450","Nominal pressure":"0.3MPa","Main Material":"Carbon steel","Design Temperature":"-20~+140","Weight":"35.5kg","Seal Material":"Modified rubber","Applicable Media":"Granular material,bulk cement,coal ash","Use":"Loading port","Application":"cover","Packaging Details":"Wooden box","Payment Terms":"T\/T","Supply Ability":"Meet large-scale orders"}}

{"cid":"91223410","title":"Eco-Friendly Customizable Anti-Theft SMC Composite Manhole Cover with Slip-Proof Design","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/65\/92\/0dce4d8ba0bb8bdd69adeb6eeff9-200x200-1.jpg","attrs":{"Brand Name":"Elite","Model Number":"MR650D","Minimum Order Quantity":"10set","Certification":"EN124\/ISO9001","Place of Origin":"China","Payment Terms":"T\/T","Supply Ability":"5,000 Tons \/ Year","Packaging Details":"Pallet"}}

{"cid":"91217453","title":"Temperature Range -40\u00b0F To 180\u00b0F Rubber Discharge Hose 500 Psi Synthetic For Marine Dredging","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/0a\/d3\/26f178f4e361fd5f469f79bed090-200x200-1.jpg","attrs":{"Price":"20 USD\/unit","Brand Name":"Jiubei","Model Number":"DN500","Minimum Order Quantity":"1unit","Delivery Time":"7DAYS","Place of Origin":"China","Certification":"ISO","Packaging Details":"STANDARD SEA WORTHY PACKAGING","Payment Terms":"tt","Supply Ability":"100units per month","Maximum Pressure":"500 Psi","Reinforcement":"High Tensile Synthetic Yarn","Length":"50 Ft","Package Type":"Carton","Material":"Synthetic Rubber","Package Quantity":"1","Cover":"Synthetic Rubber","Color":"Black"}}