Metal Mini Humbucker Guitar Pickup Mounting Ring ,Nickel plated 87mm Outside dimension: Approx. 3-13/32" x 1-15/32" ( 87mm x 37.5mm) Inside dimension: Approx. 2-23/32" x 1-5/32" (69.5mm x 29.5mm) Two pickup screw Holes Distance: Approx. 2-15/16"( 75mm) (center to center) Mounting Hole Distance: Approx. 3-1/8" x 1-7/32" ( 79mm x 31mm) (center to center) Material: Metal /Color: Nickel plated