Black ribbed vinyl matting added to your sluice gives instant recognition to see the presence of gold without needing to clean the sluice box matting. This product can also be used in other black sand and gold cleanup equipment. The overall height of the mat is 1/8 th of an inch and the depth of the groove is 1/16 th of an inch. "V" corrugation allows for easy cleaning. Low Profile Ribbed Vinyl Mat is available in various sizes. Choose size you need from drop down menu.