Your search for "BK-10E" revealed the following:

Left Trailer Backing Plate Brake Electric 10" Fits Dexter Nev-R-Adjust 3500 Self (BK-10E-01SA)

$46.57

Pair Trailer Backing Plate Brake Electric 10" Fits Dexter Nev-R-Adjust 3500 Self (BK-10E-FSA-SET)

$114.51

Four Trailer Backing Plate Brake Electric 10" Fits Dexter Nev-R-Adjust 3500 Self Adjusting (BK-10E-FSA-SET-2)

$184.99

Right Trailer Backing Plate Brake Electric 10" Fits Dexter Nev-R-Adjust 3500 Self (BK-10E-02SA)

$55.61

10" Drum 6x5.5 Bolt Pattern 3500# Rated with Self Adjusting Backing Plates (94655-B-IMP-FSA)

$246.88

ADD Brake Kit - 10" Electric Trailer Brake Kit 5x4.5 | Self-Adjusting Assembled Backing Plates & Drums (3,500 lb Axle) - (94545-C-FSA-IMP)

$264.99 — Sold Out

How Electric Trailer Brakes Work — and How to Troubleshoot Them

Electric trailer brakes are a chain: the controller sends power, the wiring carries it, the magnet reacts, and the brake shoes use the rotating drum to create braking force. When trailer braking becomes weak, intermittent, uneven, or completely absent, the fastest diagnosis usually comes from finding where that chain stops...