Kailh GM 4.0 micro switches for high-performance gaming mice. Purchased in bulk for a lower price, I'm offering them at this price. How about using them to repair your mouse's chattering issues? Shipping costs account for half of the listed price, so this is practically a loss for me. Please refrain from price negotiations. Adding one more switch is an additional 271 yen. KAILH GM 4.0 https://kailhswitch.net/products/kailh-micro-switch-gm4-0-60m-life-gaming-mouse-micro-switch-3-pins-red-dot-used-on-computer-mice-left-right-button I personally repaired the left click on my Logitech M280 using these, so I'm offering them for sale. For repair instructions, the following is easy to understand for the M280: Mouse micro switch replacement for chattering repair (Logicool M280 and M557) https://sophie-mercure.blog.jp/archives/25267017.html Other repair examples: Logicool M280, M557 Manufacturer: Kailh Model Name: KAILH GM 4.0 (60 million clicks guaranteed) Size: 12.8*5.8*6.5mm Rated Current: 100mA (A) Quantity: 1 The original switches seem to be Kailh 5M. I replaced them after about a year of use in my work mouse when I started to feel occasional discomfort. With this product, it's simply 12 times longer, over 7 years, so if you switch to this, you can use it almost until the mouse's lifespan ends. Replacement Timing Kailh Black 5M (GM 0.5) 225 days Kailh Black 60M (GM 4.0) 7.4 years (estimated) ★ Kailh Black 80M (GM 8.0) 9.9 years (estimated) Please prepare solder wick if needed. If you need it, I can include about 6cm of solder wick as an option for an additional 40 yen. Please comment before purchasing. It takes 2-3 weeks to arrive from Amazon, about a month, and you could buy a new mouse in that time.