Nut for 6-string acoustic or electric guitar that features a flat bottom side and is pre-slotted for a quick and simple install. It is made from black TUSQ material and impregnated with PTFE (polytetrafluoroethylene) which is five times more slippery than graphite. It has all the tonal benefits of TUSQ, bringing out the hidden harmonics of the guitar all while drastically improving tuning performance. Dimensions: 43.36 x 4.88 x 8.35 mm.