Musiclily Metric Plastic Guitar Switch Knobs Tip Caps Replacement for Toggle Pickup Selector Switches Fender Strat Stratocaster Guitar, Black(Pack of 5) M4 x .5 thread, 4MM diameter threaded size,can be used in metric toggle switches. Metric size is popular in guitars made outside the USA/Mexico. Color: Black Material: Plastic Package Includes : 5pcs guitar switch tips