GraphTech PQL501000 TUSQ XL Self-Lubricating Nut， Fender Style， Flat Bottom<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> TUSQ XL is engineered from the same material as TUSQ and is impregnated with PTFE which is five times more slippery than graphite </span></li><li><span class="a-list-item"> It has all the tonal benefits of TUSQ， bringing out the hidden harmonics of your guitar all while drastically improving tuning performance </span></li><li><span class="a-list-item"> 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 </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/21z3KyZujnL.jpg" noproxy>