1.materials:HDPE/HIPS 2.dimple height:8.0mm-50mm 3.breadth:1.2-2m 4.compressive strength:300Kpa The drainage board is a kind of excellent drainage system in the construction use.It has the features of high compressive strength,light weight,save a lot of water,drain quickly,fine permeability,easy to transport and install.Application:1. landscape engineering:garage roof afforest,roof garden, ...