Collars are basically just a installation aid

A portable 6000mAh power pack that doubles runtimes of compatible Lezyne LED units

Charge it up with a USB cable and keep track of the battery with the LED battery indicator

but if the fit is tight and/or it appears that the cup is not aligning properly you will need to press it in with a BB press

3 - Dual Compound - EXO - TR Kevlar Folding: 780g

Cane Creek Shock Hardware Mounting Reducers - Alloy - 6mm x 39.8mm - 1.567 Inch PLP|Model Year Collars are basically just aGenuine Cane Creek shock reducers. These will fit Cane Creek, Fox, Rockshox, Marzocchi, and Elka shocks. To determine what size reducers you need, please view your frame's manual.