2Pack MK01 MK06 TZ K1 Air Filter Replacement Compatible with Aroeve MK01 MK06 Air Purifier,ToLife TZ K1,Fre Aire KN6391,HAP601,MJ001H,DH JH01,MG01JH,MG01JH Air Purifier,4 in 1 True HEPA Filter Blue [Standard Version] 2Pack industrial_Oct2022 some of the most common Color:Amber2 some of the most common are listed below: 1 8" is often used for clusters and old Eglish style headsets 1 4" is often used for rear wheels and bottom brackets 3 16" is often used for front wheels 5 32" is often used for headsets with pressing cups Specification: Precision: G10 Diameter: 30mm Hardness: HRC58~62 Material: AISI 52100 chrome steel Package Includes: 2 Pack x Bearing Balls Approximate dimensions are 3 ToLife TZ K1 Air Purifier If you have any quality problems