Unlike our discontinued baltic birch bassknobs, these are acrylic. However, we offer full color printing on our. Take a look. Options include single and dual knobs, Custom lead lengths (Standard is 18"), Chase style RGB leds with several hundred patterns and paired remote control, voltmeter, and voltmeter and RGB led master on/off switch, and a removable bottom that allows the entire guts to be removed and replaced in under a minute.