Fortpro Automatic Slack Adjuster 1 1/2" Diameter, 10 Teeth, 5 1/2" - 6 1/2" Arm, Haldex Style Replaces 400-10143 | F224929Specifications Product Line: Brakes Category Name: Slack Adjusters Part Type: Automatic Slack Adjusters Model: Haldex Style AA1 OEM Part Number: 40010143 Anchor Bracket Type: Strap Application Type: Heavy Duty Trucks, Semi Trucks Compatible Brake Chamber Sizes: T 30 Std or T 16 T 24 Long Stroke Clevis Type: Unclevised Material: Alloy Steel Arm Bushing Inside Diameter: 5 8 in. Arm Length Position 1: 6 1 2 in. Arm Length Position 2: 5 1 2 in. Arm