LZYDD 55mm Huge Trackball Replacement for Kensington Wired SlimBlade Trackball Mouse/Kensington Expert Wireless Trackball Mouse (K72359WW) /K64325 /k72327 (Black)

My Granddaughter somehow cracked part of the outer layer off of the ball. Ordered this ball and it came overnight. Fits my wired Kensington Expert Trackball just right. No problems.

So far so good, seems to work fine with the Nulea M512 55mm trackball mouse, bought this as a backup, the black colored trackball makes it look more like a Kensington, but pretty satisfied with it so far, shipping packing could've been slightly better but no huge deal. Why did you pick this product vs others?: The Nulea Trackball appeal was mostly about price and somewhat aesthetic, but I wanted a replacement 55M in case the stock red one got damaged, but also the black color gives it a different type of feel and look although feedback seems pretty much the same. Size: Fits perfectly as a 55M trackball, I think 17.28 cm is listed as the circumference, 5.5cm as the diameter if that helps.

Fits right into my expert trackball. The red color is very nice and better than the gray one I had before. ❤️

I am not sure why be the operation of these replacement trackball are a perfect fit, but work smooth than the original Kensington slim pro.

Perfect for my wired Kensington Expert mouse and so much better than my old ball with all the dings in it.

I was so excited to replace the red one with this after reading the positive reviews. It fit perfectly but the ball doesn’t register properly, causing the cursor to skip and act weird on the screen.

I didn't think I needed this. I bought is as a backup ball for my Kensington Slimblade ball in case it got damaged, but when I tried it I was blown away. It's way more slippery, which means the mouse curser moves much faster. It's almost like the ball is floating. It's also way more precise for micro-movements. This is a must buy if you are unhappy with the somewhat jerky default trackball. Just buy it.

Smoother than the original. The color is not uniform but who cares.

Excellent ball, works well in my trackball.

Exatamente com o original.

Cela a l'air parfait, mais cela ne fonctionne pas du moins dans Kensington SlimBlade Pro : uniquement mouvement unilatéral vertical, pas de réponse pour l'horizontal. Dommage

Presa come sostituta per il Kensington Slim Blade, che però è rossa e a quanto pare questa di colore antracite non funziona benissimo, ho fatto solo un test veloce, ma non credo che sul lungo andare possa cambiare la situazione. Però devo dire che il prodotto è davvero ben fatto, materiale identico alla sfera Kensington tranne che per il colore.

Astonishingly smooth operation compared to the factory original dark red ball on my Kensington Slimblade. It feels almost too slick initially, but the low-friction movement actually enables more precise positioning without the resistance presented by the original. I've owned 3 Slimblades and this ball feels dramatically different to me, so I don't think it's just that my old ball has become worn; but either way, the replacement is well worth doing. It looks more appealing and the neutral colour blends better with everything else on your desk.