This is Tamiya 1150 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 many classic Tamiya R/C models.
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 1150 Sealed Ball Bearings (2 pcs)