Perixx PERIPRO-303GBK Small Trackball, 34mm Replacement Ball for PERIMICE-517/520/717/720 and M570, Glossy Black

Fits the Logitech mouse and makes the experience of using it better than the original ball!

I got this ball for the Logitech MX Ergo. The original ball had too much static friction, making it hard to make precise small movements. It would stick, then move too far. This ball has very low friction. It is easy to make small movements. The feeling is very smooth as well. It fits well in the mouse.If anything, I wish the rolling (not static) friction was higher. My thumb sometimes gets tired because this ball moves so easily, you have to engage a lot of thumb muscles to hold the pointer in place at times. This is sort of hard to describe. I personally like the slightly gritty and slower feeling of the blue Logitech M575 trackball better. Sadly you cannot buy that by itself.I recommend this ball. The red looks good in the MX Ergo. It is a deep dark blood red. Not much glitter in it unfortunately. Some room for improvement but largely better than the original silver ball. Price is reasonable, too.

Llego en el tiempo indicado. Al MX ERGO de logitech le queda muy bien sin problema, a mi parecer solo 2 colores de los 4 que vienen en el paquete me agradan mas ( rojo y morado), en cuanto a movimiento y presicion no percibo cambio en relacion al gris original. En general me gusto para variarle un poco.

Ho avuto diversi problemi con la sfera originale del mouse Logi MX Ergo: risultava avere alcune irregolarità che impedivano uno scorrimento ottimale della sfera. Questa sostitutiva funziona perfettamente ed è anche leggermente più grande dell'originale, il che la rende più stabile. Al momento mi ritengo soddisfatto!

Replaced a ball in MX Ergo. Silky smooth!

sieht klasse aus.