What's in the box:

1 X ZTTO Mountain Road Bike Thread Ceramic Bearing Bicycle External Bearing Bottom Brackets for Parts Crankset (Black), Black

This bicycle ceramic bearing can be well linked with other components, making the bike more smooth and unrestrained, and it has a long service life. It is a good quality bicycle accessory and is also a must-have choice for bike lovers.

Features:
Ceramic bearings can be used without oil and grease which is convenient for use.
Faster than ordinary bearings, low noise.
Long service life, wear resistance, corrosion resistance, high temperature resistance, high strength, light weight.
Waterproof, practical, can make the bicycle have perfect performance.
Easy to use and install.

Specifications:
Material: aluminum alloy, ceramic
Color: red, black (optional)
Adapt for:
For Shimano f24/24mm
SRAM GXR f24/22mm
For 68mm/73mm f34.798mm Frame Shell
BSA 68/73 Bottom Brackets
Item size:
Total size: 100 * 50 * 50mm / 3.9 * 2.0 * 2.0in
Inner diameter of BB: 21.93mm / 0.86in
Outer diameter of BB: 23.95mm / 0.94in
Item weight: 90g / 3.2oz
Package size: 130 * 90 * 80mm / 5.1 * 3.5 * 3.1in
Package weight: 100g / 3.5oz

Package list:
1 * Ceramic Bearing