This complete left‑side (driver side) electric brake kit is designed for 7,000 lb trailer axles using a #42 round spindle. The kit includes: (1) #42 EZ‑Lube round spindle with grease fitting, (1) round washer, (1) castle nut, (1) cotter pin, (1) 8‑lug brake drum (8×6.5" bolt pattern), (5) lug nuts, (1) 12" left‑hand electric backing plate (pre‑assembled with shoes, springs, magnet), (5) backing plate mounting washers and nuts, and (1) 7,000 lb bearing kit containing: (1) 2.71" dust cap, (1) 14125A outer bearing (1.25" ID), (1) 25580 inner bearing (1.75" ID), and two grease seals (2.125" ID seal 10‑10 and 2.25" ID seal 10‑36) to fit different spindle seal surfaces. This kit is for the left side only – order a matching right‑side kit separately for a complete axle. Professional welding required for spindle attachment. Always verify axle rating, bolt pattern (8×6.5"), bearing numbers, and seal size before ordering.