The Carrymaster ACP series are light-duty swivel casters with low profile that combine the functions of a caster and a leveler. ACP series casters come with anti-vibration leveling foot(default NBR nitrile rubber pad, optional urethane pad) that can be easily adjusted by turning a thumbwheel. ACP series comes in two mounting types, one with a stem (S type) or the other with a plate/flange (F type). ACP series load capacity is 441lbs per caster and the wheel size is 50mm. The metal frame of ACP series is SPC zinc galvanized finish. The default finish color is zinc and some models come in black color. The default wheel is made out of Polyurethane (PA6 material, Black).