Jim Dunlop J227 Brass Concave Slide – Medium
A specialty brass slide with a concave profile, purpose-built for guitars with a curved (radiused) neck — giving you full, even string contact across all six strings for cleaner chords and sustain in open tunings. Machined from solid brass and shaped to match a 12" fretboard radius, the J227 makes complete contact with every string, holding tone evenly across full chords rather than favouring the middle strings like a standard round slide. Specs: Type: Solid brass, concave profile Size: 19 x 25 x 65mm (3mm wall thickness) Fit: Medium (ring size 9) Style: Concave, for 12" radius necks Great for: Acoustic open-tuning players wanting even, full-chord slide contact on a 12" radius neck — where a standard round slide loses contact on the outer strings. Note: Sizing is approximate — if you're between sizes, we're happy to help you pick the right fit.