Kailh PG1511 series is a family of Cherry MX clone switches. PG1511 series adopted the use of all four of Cherry's base holes (inner holes for monochrome LED, outer holes for jumper or diode) for a single four-leg "DIP" through-hole RGB LED. Most "speed" types accept any LED types, but have no lateral support for LED legs. The pink "speed" type only accepts two-pin through-hole and SMD LEDs; the exterior holes for jumpers, diodes and four-pin through-hole RGB LEDs are omitted to make way for the click bar.
*For more information, you can download the spec sheet here. Note : PG1511 Rose Pink specifications same as PG1511 Bronze, the only difference is stem color.