Product Description The Sealed style pickup fits for 4 string JB style electric bass, Squier Affinity PJ bass, like Fender/Squier Jazz or similar bass. Bar Magnets are passive, have a nice punch and tone range as well, dark and muddy sounding, these are clear and snappy. The stock pickups are made of metal and ABS,durable to use, triple wax dipped and vacuum sealed to eliminate any unwanted feedback and noise.Two conductor wires, white wire is ground, black/red wire is hot. Color:Black Cover:Plastic Cover Options:Sealed  Wire clip: plastic Magnet: Ceramic magnet Cable:Two Conduct PVC Wire Neck & Bridge size(LxW):As the picture show. Prewired cable length: 244.5/232.4mm (9.63/9.15in) Resistance: N6.3K/B6.5K Package Includes:  1 pair of Bass Pickup  8 pcs mounting screw 8 pcs springs The size difference is between 1-2mm. Item's color might be different from the picture because of the aberration. Remarks: In addition, the color of wiring is different because of different batches, and the wiring color of each batch may have color changes.