What you get - A set of 4 casters designed for stable mobility and easy replacement on display stands and other light to medium duty equipment. Key specifications and features - Size: 1.5 inch mounting size - Wheel diameter: 40 mm - Material: white polypropylene (PP) for durable, long lasting use - Mounting: M6 threaded roller for stable, secure installation - Movement: provides smooth rolling to facilitate easy repositioning Why this helps you - Durable construction with white PP material resists wear in frequent use scenarios - M6 threaded roller ensures a reliable, straightforward mounting compatible with standard M6 fittings - The 40 mm wheel diameter offers smooth movement across surfaces commonly used for display stands and lightweight equipment Use scenarios - Display stands: upgrade or replace casters to enable easy repositioning during setup or teardown in galleries or shops - Lightweight furniture or shelving: add mobility to small tables, carts, or storage units that need to be moved frequently - Portable equipment or tool carts: organize and relocate instruments or tools in workshops, studios, or labs with minimal effort Installation notes - Ensure mounting surface matches the M6 threaded roller specifications - Suitable for applications where a 1.5 inch mounting size and 40 mm wheel provide the desired balance of stability and maneuverability These specifications stay consistent with the original design and function, offering clear, practical benefits for quick decision making and reliable performance.