oam PVC water spouting, rain gutter for roof rain collection, gutter size 4"X5", downspot 3"X3", high strength, long life ... and a reasonable schedule design,the main component is the gutter and down spouts.PVC drainage system is internationally common water ... ,residential and office building. style:dual wall 5.2 inch,gutter size:130*103mmdown pipe size:85*63mmcolor:White,Brown,Grey ...