After you receive the item, if you are not satisfied with my item or service, please contact me before you leave feedback, I will try my best to fix it for you

Return& Item Quality control:
1 year warranty  

Fit with:
Aeroad CF 9.0/8.0 2016~2020
Endurace CF SLX / CF SL / CF 2016-2021
Grail 2018-2020
Inflite CF SLX / CF SL / CF 2018-2021
Ultimate CF EVO / SLX / SL 2016-2021

Please read the following bearing measurement carefully

Lower Bearing Size- 1 1/4: AC3344/ 33x44x6
Upper Bearing Size- 1 1/4: AC3544/ 35x44x5.5

2 Types of Bearing Option:

Regular Bearing：

Race Material: P6 bearing steel

Ball Material: P6 bearing steel

Enclosure: 2 Rubber Seals

Hybrid Ceramic:

Race Material: P6 bearing steel

Ball Material: Nitrided Silicon Ceramic SI3N4

Enclosure: 2 Rubber Seals