A PCB must be added from the [Add-ons] product listingA 60% XT layout custom mechanical keyboard featuring a plateless gummy O-Ring mounting system. Kit Includes: Case Parts Full Aluminium Plate 6 Poron Gaskets 50a O-Ring Bumpon Feet Extra Hardware Microfibre Cloth Carrying Case Layout Options: WK WKL Materials: 6063 Aluminum Case 304 Stainless Steel Middle Piece and Weight Frosted Polycarbonate Accemt Mounting: Plateless Gummy O-Ring Mount Top Mount Quality Control: A stock: - All external surfaces should have no visible flaws and as close to flawless as possible. Small internal flaws are fine. B stock: - External faces of keyboard may have minor visible flaws. Very Important Note: All units will have filing marks on the underside of the top case. These are only visible when the top case is completely removed, it is not visible when assembled or un-built.