You are buying;

2 x Mounting Rings - (curved base edge to fit carved-top guitars)

Outer Dimensions - Length: 91mm, Width: 45mm, Height: (Neck) 4-5mm (Bridge) 9-10mm

Inner Dimensions - Length: 70mm, Width: 39mm

Screw Hole Spacing - Left to Right: 83.5mm, Top to Bottom: 37mm

Distance between pickup mounting screw holes: 78mm

Also available with screws and springs in Gold, Black, & Chrome in our Ebay store