This is a replacement Kyosho Threaded Short Length Big Bore Shock Set, intended for use with the Kyosho MP9 TKI2. Plastic pre-load spacers are a a thing of the past! These shock bodies are threaded, allowing for fast and accurate pre-load adjustments. These are also an excellent option for the standard MP9. These parts will allow you to more easily tune your chassis to different track conditions, and make your MP9 even more versatile.