SQUARE CAST IRON / DUCTILE IRON MANHOLE COVER, 200X200MM-1100X1100MM,CLASS D SQUARE CAST IRON / DUCTILE IRON MANHOLE COVER, CLASS A15,B125,C250,D400Speclification(mm)Base Size(mm)Clear opening(mm)Depth of frame(mm)Depth of insertion(mm)DR6080060010064DR801000800100648508506001002060080060011050850850X85060010020750750X75060010020TAWIL-Taiyuan Water Industrial Co.,Ltdtel:0086 351 7239569fax:0086 ...