-Thru Axle Universal Derailleur Hanger Only -M12x1.75tp (Maxle type TP) -w/upper Anti Rotate tab -Mounting Nut sold separately -Sold individually 2020 Sight Alloy 2020-2021 Fluid Alloy FS MKIII 2020 Sight Carbon FS MKIV 2020 Sight Carbon VLT 29 2020 Sight Alloy VLT 29 2020 Optic Carbon 2020 Sight Carbon 2020 Fluid Youth FS