Thank you for viewing. This item is a spacer for P-90 dog-ear pickups. You can specify the thickness and angle to match your guitar. Basic information for the spacer: Length: 41mm Width: 118mm Screw hole spacing: 96-103mm. If you wish, we can also make it to your specified size. For the semi-order, please select either flat-top or arch-top, and specify the thickness and angle. If you don't know the angle, you can specify it as ●mm on the neck side and ●mm on the bridge side. Regarding the thickness, please keep it under 10mm. For arch-top, the standard for the angled thickness is as shown in image number 10, with the center of the bridge side as the reference point. The arch-top spacer is based on the Archtop Tribute AT101, an ES-175 type guitar made by Terada Gakki. Please note that it may not fit all arch-top guitars without gaps. The spacer material is flexible, so it is possible to install a flat-top spacer on an arch-top guitar by flexing it. Please choose according to your preference. The product is made with a 3D printer, and the material is biodegradable PLA. Unlike general plastics, the surface is not smooth and has small bumps. Thank you for your understanding. Thank you for your consideration.