The Karin (Amboyna burl) knob is now discontinued and likely difficult to find. – Material: Karin (natural wood). I believe the box and all original accessories are included.
YUMEYA Spinning Reel Handle Aluminum Double Handle 45mm Discounted
Release dates may be delayed by the manufacturer.
SHIMANO Yumeya Aluminum Sensitive Knob Gold Silver Red Reel Parts Fr Japan
Handle knob type: A. Handle knob type A cannot be attached to 05 Ultegra models 1000, 2000, 2500, C3000, 3000, 4000, 5000, 6000 and 11 Elf C5000PG. Handle Knob Type: A. Handle Knob Type A is not compatible with 05 Ultegra models 1000, 2000, 2500, C3000, 3000, 4000, 5000, 6000, or 11 ELF C5000PG.
SHIMANO Yumeya Aluminum Round Power Handle Knob Gray L Type B 26873 Japan JDM
Weight: 25.5 g. Made in Japan.