OLD-SCHOOL TONE Fender® Solid Brass slides are superb for a full warm tone that is lively and resonant with big and bright singing sustain. If you are looking for an all-purpose slide that can be used on both acoustic and electric guitars solid brass is an excellent choice. Dimensions: Length: 60 mm Wall thickness: 3.5 mm Inside diameter: 22 mm FEATURES Standard Medium: Length 60mm/Wall thickness 1.5mm/Inside diameter 19mm