Thumb Rest For Rickenbacker 4003.  Acrylic Thumb rest fits to your pickguard using existing fixing holes. Comes complete with longer fixing screws.

Laser cut and polished to a mirror shine, designed to seamlessly fit and match the lines of your bass.

Fits both RH and LH 4003 basses built between 1992 and 2015. See pictures.

Does not fit 4003s, s5 or s8 basses built around 1993.

Send a picture of your bass if unsure.