This link is only the keycaps for Ergodox Keyboard,no keyboard included The keycap is made of durable PBT material,the thickness is about 1.4mm.The tactile feeling is smooth The keycap is DSA profile and all rows are same height. This PBT keycap is compatible with ErgoDox/ Lily58 /Planck /Preonic DSA profile is lower than XDA profile