... Bottom layer with block. After absorbing liquid permeates the ground is not working or after use, easy to clean ... and hair debris left, more suitable for the ground move and the workplace.SizethicknessCount&PackagingAbsorbencyKeywordsDescription40cm*50cm3mm200pcs/B>145L ... sea, rivers, lakes, 2, shipping, oil, water port wharf etc, also used in oil liquid machine factory, pipes, such spill prevention ...