The FA Nippon Kori offers a translucent, Sanwa JLF, Seimitsu LS, and Hori Hayabusa compatible 35mm balltop with a hollow threading for LED lighting.
Closest Match to OBSC and KN
"Kori" in Japanese means "ice". Each of the available 8 deliciously colored balltops are designed to represent a close match with Sanwa OBSC series pushbutton, plus Seimitsu K and KN series pushbutton.
The standout feature in the Kiro balltop is its hollow threading, which easily screws onto the shaft of popular Sanwa JLF series, Seimitsu LS series, and Hori Hayabusa joysticks. Coupled with a hollow joystick shaft, you can wire a small single or RGB LED into the balltop.