1,Environmental protection 2,Longevity 3,Excellent anti-pressure 4,Competitive price 5,Nice appearance&Anti-theft&Low noise Do PLS tell me the shape and the size ,so I can quote for you ASAP!Picture is only a part ,and we have all the manhole covers , including :1,all kinds of shape, square,rectangle,round,circle,2.all kinds of colors, red,blue,white,and so on,3,all kinds of designs , patterns ...