Musiclily Humbucker Pickup Mounting Ring Flat Bottom Metal for Electric Guitar, Chrome Outer Dimensions: Approx. 88.8 x 45mm; Inner Dimensions: Approx. 70 x 38mm Mounting Screw Hole Spacing: Approx. 80.5 x 37mm PU Hanging Screw Hole Spacing: Approx. 78.5mm Made of Metal Alloy Thank you for viewing. This is a mounting ring for humbucker pickups. I purchased it for modifying a Fender Telecaster. Purchased on Amazon, unused. Inch size. Heavy metal construction, chrome plated. It was possible to install it on a Telecaster with a rear humbucker without modification. The screw heads fit perfectly. It seems it can also be used for PRS guitars, etc. Since it is flat, it cannot be used on guitars with an arch. Thank you very much. ※The small bottle used for the photo is not included. #humbucker #pickup #mountingring #chrome #metal #mod #guitar #electricguitar #parts #guitar