Product Overview The 6 Inch (150mm) Heavy Duty Korean Style Red Plastic-Core PP Caster is the heavy-duty champion of the PP series. Featuring a red PP-on-PP dual-color injection molded wheel (Shore 95-98, D scale) on a plastic core, this caster delivers 300kg per wheel with zero rust risk. The all-plastic construction is completely rust-free, making it ideal for humid, wet, or corrosive environments. The 50mm flat/plain tread provides stable ground contact, while the 5.5mm