Check the listing for details. The Rock Slide Polished Brass Slide - Extra Large. Condition: New. Listed at 31.95 USD. Much More Than the Average Slide The Polished Brass Rock Slide is designed and carefully crafted with your needs as a player taken into careful consideration. The Rock Slide is simply unmatched in comfort, thanks to the design's contoured finger rest and knuckle cutaway. And the slide's tapered interior ensures a uniform fit along your whole finger, adding stability and control to your slide performances. And the slide's polished brass material is legendary for its gritty feel and cutting sustain, making your passages jump out.Polished Brass The Polished Brass Rock Slide is the one that started it all. Brass imparts your tone with a cutting sound. And its rougher surface area adds a bit of drag and grit while traveling across the strings.