(D86) Guitar Cavity Cover Back Plate For Jazz Bass Precision Bass JB PB BALCK Special design for JB and PB bass Size (L x W): Approx. 7.04 x 3.62 inch / 179 x 92mm Distance Between Hole Centers: Approx. 2.95 inch / 75mm, 3.66 inch / 93mm, 2.95 inch / 75mm, 6.61 inch / 168mm No mounting screws included. Material: ABS