The VITE Cap hollow-design allows the user to see the grout joint. This makes the VITE Cap suitable to be used both on tiles' sides and intersections. A Box of 900 caps will work with Spin Doctor Tile leveling Threaded Post. VITE Screw Cap Tile Leveling System cap and base plates are interchangeable with the spin doctor leveling system. VITE Spin Cap Tile Leveling System by Raimondi.