<br> <b>Note: </b>Some non standard US layout mechanical keyboards can't use this keyset. Because the size of the Space Bar / Ctrl / Win / Menu and Alt keys are different. <br> <br> <b>Description: </b> <br> <br> → The main material of this doubleshot backlit keycap is PBT; <br> <br> → This keyset is standard ANSI / ISO layout; <br> <br> → The thickness of the backlit pbt keycaps is about 1mm, the height is OEM profile; <br> <br> → The keycaps fit most 61 / 87 TKL/104/108 mx switches mechanical keyboards. But the size of the Space Bar / Ctrl / Win / Menu and Alt keys of some keyboards maybe different from this keyset, so you can confirm with us, if you are not sure about the keycaps size of your keyboard.  <br> <br> <br> <b>Keycaps Size:</b> <br> <br> → Ctrl: 1.25u <br> <br> → Win: 1.25u <br> <br> → Alt: 1.25u <br> <br> → Menu: 1.25u <br> <br> → Space Bar: 6.25u <br> <br> <br> <b>Our keycaps are all brand new products. We do not sell second-hand or refurbished products. Happy Balls is the only Amazon store for Happy Balls keycaps, we don't have other distributors.<br> If some keycaps are broken or missing or other problems when you receive the keyset, you can tell us , we will try our best to slove your problem.<br><br><br>