This is a pack of four 5x11x5mm metal shielded "Speed" ball bearings. ProTek R/C "Speed" bearings are high quality steel/chrome bearings designed for the R/C racing enthusiast.
- Tekno RC NB48
- Tekno RC NB48.3
Note: This list may not be 100% accurate or up to date, and is meant to be used as a guideline for compatibility.