Seimitsu LB-39 35mm Red Bubble Ball Top for Sanwa, Seimitsu, and all 6mm threaded Joystick Handles! Seimitsu high quality bubble ball top 6mm threaded hole for Seimitsu, Sanwa JLF, or any 6mm threaded shaft Crystal clear Red with thousands of tiny bubbles We can drill a hole for you if you want to light it up!