2 Set Musical instrument accessories: 1 Set x Humbucker Pickup & 1 Set x 4 bass strings Compatible with 4 string bass guitar, Diameter of String: . 0.1 inch, 0.08 inch, 0.055 inch, 0.04 inch (2.5mm, 2mm, 1.4mm, 1mm) Good tools to replace your guitar string, good gift for guitar beginner. Suitable for most electric guitar or similar guitar pickup replacement. Suitable for all positions Bridge, Middle or Neck A "hot rail" style single coil pickup. "Track" makes traditional pole-pieced retro thick punchier sounds your picks "when you need a SOLO lead or some heavy chugga-chugga Ceramic rods 57 mm steel rail chrome color resistor TOTAL 15-16 K ohms Single coil pickup 7-8 K ohms. High output treble bite and clear and powerful bass response with 4-wires lets you choose coil-tapping if necessary or can be wired with every traditional 2-wire pickup Powerful ceramic magnets are produced plus stainless steel railings to take-no-prisoners tonality. It is completely wax released and vacuum sealed to unnecessary feedback and noise. Easy to install. Base brass Output a 4-core cable to switch single. The pickup size is approximately 68 X 36 X 18 mm long x wide x high. colour:black+Silver Material:Copper + plastic + metal+Steel Package Contents: 1 x Humbucker Pickup 1 set x 4 bass strings Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.