here is a cobra biocell,fly z, .335" shaft sleeve.9-12 degree,  these are aftermarket oem quality sleeves, i have been selling aftermarket sleeves for some time inc to pro shops who have all been happy with the quality. these sleeves do not use a plastic ferrule so if re using a shaft that previously had a long ferrule or deeper sleeve/head , you may have glue/sanding marks visible after fitting. theres nothing stopping you adding your own slim ferrule.. i have the full set of cobra sleeves in .335", 9-12 driver, 8-11 driver , 7-10 driver,13-16 3wood, 17-20 5wood.  and 3-4-5 hybrids..see my other items. NOTE..335" is 8.4mm and .350" is 8.9mm... i have now stocked .350" 9 to 12 degree for the biocell-flyz king etc. these are very hard to find let me know if you require a .350, i will be listing them separately.