Pickups : Shadow SHA-097 under saddle acoustic pickup

For nylon string(classical) guitars Piezo bridge installation Can be installed out of sight under the original saddle Height: 1.8 mm Suitable for standard bridge slots with a width of 2.3 mm Length: 7 cm

https://www.shadow-electronics.com/doc/pro_pdf1/en-GB/SH_097_englisch.pdf