JT201012 Series:

Weight: about 388g/pair Size: about 12*10.7*2cm Material: Aluminum Alloy + Chrome-molybdenum Steel

2016-12 Series:

Weight: 398g/pair Size: about 12*10.6*2cm Material: Aluminum Alloy + Chrome-molybdenum Steel

Feature:

1. Anti-slip 2. Effortless 3. Dustproof 4. Waterproof 5. 2 Bearings 6. Stable & Frim