Slack adjusters for the air brakes of trucks, buses, trailers and passenger vehicles. A slack adjuster links the brake chamber pushrod to the S-cam shaft and keeps the brake set to the right clearance as the linings wear. The range includes a green-painted adjuster with a long arm and mounting eye, a splined centre bore, a grease nipple, a bolted metal cover plate and a gold-coloured control arm with a slotted bracket; its arm carries the cast marking 5015. Versions also come with a green arm and bronze-coloured body, and in an all-black finish.