These castors will be the perfect accessory for small equipment and furniture like a workbench, trolley, coffee table, plant stand, bookshelf, shopping cart, etc. These castors are made of thermoplastic rubber which is distinguished by a good shock and vibration resistance, enabling these castors to run smoothly and quietly. Additionally, their soft surfaces effectively protect your floor from scratching. Besides the zinc-coated iron frame is highly rust-resistant and thus adds the sturdiness and durability to the castors.