The universal matting for fine gold recovery that has been used in Keene sluice box and suction dredge systems for many years. They key is in the small ribs that help capture and trap the fine gold that would have been washed away without it. Matting is sold in various widths and lengths, for instance 12″ x 36″ is a common size normally on hand. To check on other sizes and current availability please Contact Us and we will be happy to assist you.