The GPM ER007S pillow balls are engineered as Steel#45 steering joints for front and rear fitment on Traxxas E-REVO platforms. Emphasising precision and durability, these components are intended to reduce steering play and sustain consistent response under repeated loads. Compatibility covers E Revo56087-1, Revo, E-maxx, and Summit models, making ER007S a reliable upgrade for hobbyists focused on long term durability and improved handling.