SpecsKeys Number: 139 KeysMaterial: PBT Dye SublimationProfile: MOA ProfileCompatibilityFriendly Remind: Only Keycaps included, no keyboard. Compatibility: 60%/70%.80%/90%/100% layout keyboards.Not compatible with Razer/Corsair/Dareu EK85 and short profile keyboards.FeaturesResistance to yellowing & OilingThicker keycaps can also contribute to a more muted typing sound.