OEM 3-Inch Full Black PP Stem Caster with Brake – M12×30 Threaded Stem Easy Installation • Smooth Mobility • Reliable Braking • OEM Customization The 3-inch full black PP stem caster is designed for equipment, machinery, and mobile units requiring convenient installation and reliable everyday mobility. Featuring a durable polypropylene (PP) wheel, a single ball bearing, an M12×30mm threaded stem , and an integrated brake system, this caster offers practical maneuverability