Bass tuners of Xybguitars are vintage open type. Fits for electric bass like jazz bass and precision bass, etc. , as well as other 4-string basses with proper size. The tuners of 4 string bass are made of A3 steel material. The parts are through die-casting to fix the shape firstly. Then, through turning, etc. to handle the surface and fix the dimensional precision. After plating treatment, achieves high finishing quality and anti-rust characteristic. And also because of properties of material, the tuners have certain hardness to avoid deformation. With heavy duty gear, no problem for long time service. Because the bass tuners are vintage open type, thus, contains light weight and unique aesthetics. An ideal choice for replacement of old, broken ones, also a good choice for building of bass guitar. The width of head is around 40mm. Overall length is around 88mm. The configuration is 2L + 2R, 4R or 4L for option. Introduced gold plated color. Package includes 16 PCS of screws and 4 PCS of nut. Net weight is around 0.37kg. MOQ is 20 SET.