The Blues Bottle slide will take you back to pre-depression Mississippi, where Blues Masters used medicine bottle slides to form the roots of modern day blues. Blues Bottle slides are individually hand-blown of durable, seamless Pyrex glass. The weighted, closed ends provide optimum balance. Dunlop slides are today's most popular slide.
Good Balance with Classic Tone
Model 272 specs:
Additional Slide Information
Glass
Usually made from Pyrex, can also be tempered glass
Slides typically are sized S, M, L, and XL, which refers to the inside diameter, specifically.
These are approximate — slides vary from model to model and are handmade. The basic process is to figure out which finger you want to use, get a ring size, figure out what material/type of slide you want, and get close. It doesn’t need to fit like a ring. A little space is a good thing: snug enough to stay in place and have control but loose enough to be comfortable
Shorter slides are useful if you want to wear a slide and switch back and forth between fretting and sliding. A shorter slide allows your finger to bend and tuck out of the way.
Longer slides can cover across the entire neck (all six strings) allowing more immediate note choices and possibilities.