How to Use:
Product Sequence Description (from bottom to top, the headsets are installed on the upper and lower ends of the frame head tube): Bottom File(30mm/39.8mm Switchable)‑Lower Bearing‑Lower Headset‑Upper Headset‑Upper Bearing‑Urgent Loop‑Headset Cover‑Sunflower Top Cover Kit.

Specification:
Item Type: Bicycle Double Bearing Headset
Material: Aluminum Alloy
Specification: Approx. 44-55mm/1.7-2.2in (with 28.6 Straight Tube/1.5 Tapered Tube)
Applicable Situation:
Frame Head Tube: Upper Tube Inner Diameter 44mm/1.7in, Lower Tube Inner Diameter 55mm/2.2in.
Front Tube: Upper End Outer Diameter 28.6mm/1.1in, Lower End Outer Diameter 39.8mm/1.6in.
Tapered Tube: Upper End Outer Diameter 28.6mm/1.1in, Lower End Outer Diameter 30mm/1.2in.
Applicable Measurement Instructions: (The Same Four Data Can Be Applied)
The inner diameter of the upper tube and the inner diameter of the lower tube, to obtain the inner diameter of the upper and lower tubes of frame;
The outer diameter of the upper end and the outer diameter of the lower end are the outer diameters of the upper and lower ends of the front tube.

Package List:
1 x Sunflower Top Cover Kit
1 x Headset Cover
1 x Urgent Loop
1 x Upper Headset with Bearing
1 x Lower Headset with Bearing
1 x 30mm Bottom File
1 x 39.8mm Bottom File