One of the key causes of tuning frustration is string binding at the nut. Black TUSQ XL, impregnated with PTFE, the slipperiest substance on earth, alleviates the binding grip the nut has on the strings. String simply glide back into tune!??How does it sound? 

With Black TUSQ XL you will hear more richness from every note you play. Engineered from the same material as our highly esteemed TUSQ, it has all the tonal benefits, bringing out the hidden harmonics by transferring your strings vibrations efficiently to the guitar. Black TUSQ XL is consistent from piece to piece, and within each piece, to offer you harmonically rich tones without the problems associated with natural materials. 

Measurements: 

Length – 44.45mm / 1.750" 

Width – 6.27mm / 0.247" 

Height – 8.48mm / 0.341"