4 / Set. Add some pizzazz to your Evolution Ball Chair (sold separately) with these premium casters. Nonmarking wheel is mechanically bonded to a polyolefin core to prevent separation over time. Precision ball bearings rotate smoothly for excellent rollability. Long-life tread keeps your floors protected from scratches and streaks. Clear casters are designed for use on all floor surfaces.

• Product Color: Green
• Brand Name: Posture Perfect Solutions