Revisions Rev. 2: Inserts were revised to fit more PCBs. Rev. 3: More colors + a new variant to fit 1.2T PCBs. 1.6T is the standard spec so most PCBs are 1.6T. The only 1.2T that came to my mind is probably the Polaris. Please check your PCB spec before buying. Rev. 4: Named "AP" aka "Almost Perfect". Has multiple improvements in housing and stem to make the wire fit better as well as even less wobbling and noise. Introduction Introducing the "Almost Perfect" TX Stabilizers!Implementing a patented technology, kin25 of TX Keyboard has improved the design of Cherry clip-ins to minimize rattling and prevent wire pop-out (using stab stoppers included with the set). The patented design features a double shot stabilizer stem with a POM outside and TPU & POM mixture inside. This mixture helps to minimize wire rattle and bottom out noise. Specifications PCB mount, clip in, enough for ANSI TKL and 60% layout. One full WK and WKL kit includes: 10x stabs 4x short wires 2U 2x long wires (1x 6.25U and 1x 7U) 1 pack of stab stoppers One 2u kit includes: 6x stabs 3x short wires 2U 1 pack of stab stoppers