Stiff synthetic bristles. 7 1/2 x 3 1/2 wood block with strap. This un-assuming tool is perfect for removing that caked on muck from winter coats, blankets, and hooves. Also will scrub dirty legs when combined with a bucket of warm soapy water. Size is 7.5 X 3.5 Inch. Dimensions are 0.542 X 0.417 X 0.448 Wood Handle with Synthetic Bristle. UPC Code = 754888018762