These Vintage 4 Clear Glass Furniture Caster Cups by Bartlett-Collins are a set of 4 round, 3" cups designed to protect floors from chair, love seat, daybed, and armchair casters. Made of solid clear glass with a glossy finish, these cups have a retro style and are suitable for adults in any room of the house. Easy to care for with a damp cloth, these caster cups are an original Mid 20th Century design and are a practical and decorative addition to your furniture accessories. Made in the United States, they are a unique and stylish way to protect your floors while adding a touch of vintage flair to your home.