4 in 1 1.98 inch Stainless Steel Boat Trailer Hub Bearings with Protective Covers, Trailer Hub Bearings % Cutting Boards Power supply mode: built-in lithium

Power supply mode: built-in lithium battery 5V

Can block direct sunlight

One Package Size 12cm * 12cm * 5cm / 4

After full charging

Leather screen type: TFT color screen

4 in 1 1.98 inch Stainless Steel Boat Trailer Hub Bearings with Protective Covers, Trailer Hub Bearings % Cutting Boards Power supply mode: built-in lithium1. Using in salt water since it is stainless steel and therefore will not rust. 2. Measures 1. 980 inches at its base. 3. It is designed to be used in most 4 and 5 bolt hubs. Bearing buddys put a small amount internal pressure in the hub (about 3psi). 4. Function: Reduce the failure of the wheel bearing of the marine trailer, prolong the life of the bearing and prevent water and dirt from entering the hub and bearing 5. Material: stainless steel