Dunlop Short/Medium, Heavy Wall Glass Slide No. 21810
5 ring size, 51mm long, 4.5mm wall thickness, 20mm inside diameter.Tempered glass slides are preferred for full, rich tones. They sound warmer and more resonant than metal slides, producing smooth transitions with minimal string noise. Tempered glass slides are the top choice for many acoustic players, and theyre also favored by electric players who want the purest slide tones possible.