Thank you for viewing! This product is a "Finger Ramp for JB Bass - Front, Bridge Side" that combines a finger rest. Dimensions: Finger ramp width: 91mm Length: 28.5mm on the 4th string side, 47.5mm on the 1st string side Thickness: 6.9mm near the center, 4.9mm on the 1st string side (Asymmetrical, with the 3rd string side being the highest) Pickguard thickness: Assumes 2.5mm Finger rest length: 73mm Height: 10mm A recess is made to avoid interference with the screws holding the pickguard. However, it's been fitted to my own bass, so if it interferes, please remove the screws. Made with a 3D printer, the material is PLA. Unlike typical plastics, the surface is not smooth and has small bumps. Thank you for your understanding. Double-sided tape is included, so please use it to attach the ramp. Thank you for your consideration.