This is Tamiya 1050 Sealed Ball Bearings 2 pcs. These are rubber sealed ball bearings, which offer smooth rotation, great precision of attachment and even simplified maintenance.
Material: Metal / Rubber
Color: Silver / Blue
Applications include Tamiya R/C models with double cardan joint shafts
Using ball bearings in place of plastic and metal bearings gives more efficient rotation and better parts setup.
These ball bearings employ blue rubber seals rather than metal ones – this allows you to open up the bearings to clean and work on them. Blue rubber seals also vastly help in the prevention of debris entering the race roller.
Low-viscosity oil is used to lubricate the internal workings.
Periodically perform maintenance such as adding oil; after crashes, checking bearing movement is recommended.
Tamiya 1050 Sealed Ball Bearings (2 pcs)