These humbucker mounting rings have a flat bottom for guitars without a carved top or where you wish to sand your own curve to the bottom. 

Please note that if your guitar top is carved you should not attempt to curve the ring by tightening the screws as this can cause them to crack.

Specification:

• 45 x 90mm
• Neck ~6mm sloping to 4mm high
• Bridge ~12mm sloping to 10mm high
• 4 Long and 4 Short Mounting Screws

Humbucker Rings Data Sheet