Seald beering Direct Mount Hub.

Hydraulic disc brake hub. 

• Package included: 1 front hub, 1 rear hub and 2 skewers.
• With 36 hole drillings, compatible with 5/6/7/8S rotary freewheel.Bicycle Axle Wheel Hub - 36H Front and Rear Bike Hub Set, Aluminum Alloy Quick Release Lever Skewers Axle
• Precision-machined steel balls for a smooth and fast ride.
• Low-friction seals effectively shut out water, mud and dirt.Quick release lever allows for fast installation and removal
• Widely Compatible: Suitable for most Mountain Bike, Road Bike Mechanical Disc Brake System.