i have a set of extensions for a 636. these have been used for about 8 months and still look great they have been sprayed black to match the frame and have all the necessary hardware to install them besides the extended chain.they are 6-9 inch adjustable yana shikis.i paid 250 for these plus 70 for the stainless braided brake line and i will let the extensions and line go for 200 obo.you can contact me at 727-366-8384 or send me a pm my name is joey.thanks