The Midland Haldex SC18D is a Type 18 Air Disc Brake (ADB) service chamber designed for air disc brake systems on heavy-duty trucks and trailers. It delivers a standard-stroke configuration with 2.5 inches of available stroke and a ball-end pushrod. Key mounting dimensions include a 4.75-inch stud spacing (E), a pushrod length of 0.59 inches from the face of the service housing (J), a service clamp-band position at 160 degrees (S1), and an air port position at 90 degrees (T). Call us to confirm proper fit for your specific brake assembly and axle configuration.A factory handling fee of $25.00 per unit is added at checkout.FeaturesType 18 ADB (Air Disc Brake) service chamberStandard stroke with 2.5″ available strokeBall-end pushrod threads4.75″ stud spacing (E dimension)0.59″ pushrod length from face of service housing (J dimension)Service clamp-band at 160 degrees, air port at 90 degreesTech SpecsActuator Type: Size 18Stroke Type: StandardAvailable Stroke: 2.5″Pushrod Threads: Ball EndE – Stud Spacing: 4.75″J – Pushrod Length from Face of Service Housing: 0.59″S1 – Service Clampband Position: 160 degreesT – Air Port Position: 90 degrees