Brass slide 224 Jim Dunlop heavy. Thank you for your interest in the Brass slide. Brass slide 224 Jim Dunlop heavy. 22 x 29 x 60, fits ring size 13. Chosen for years for its bright resonant tone and comfortable weight. Solid Brass slides are favored by acoustic & electric players alike for their comfortable weight mass, combined with the unmistakable string overtones and ambiance created by a metal slide. Solid brass provides a warmer and darker tone than chromed brass or chromed steel slides, but sounds brighter than glass or ceramic slides.