The CajonPort delivers more depth, presence and precision - adding incredible enhanced low-end while simultaneously creating greater distinction between the Cajon's bass and snare sounds. The result is a dramatically, less boxy, more versatile and expressive instrument, opening the cajon to a variety of new and exciting performance applications. CajonPorts fit cajon holes 4.5'' to 4.75'' and up to 5'' with additional sizing bands. Colour: Black