STOPS YOUR FURNITURE FROM MOVING. Are you tired of your furniture moving when you sit down or stand up? Unlike other brands, CasterMaster caster cups are made with anti-slip flexible rubber that is designed with small rubber ribs to grip your floor and hold your furniture in place! No more sliding around with these specially designed rubber furniture stoppers! They are also a great support for upright and grand pianos, outdoor BBQs and outdoor furniture. | PROTECTS ALL FLOORING. CasterMaster caster cups protect ALL flooring types! This includes but is not limited to hardwood, linoleum, vinyl, carpet, ceramic tile, & cement floors. No more scratches, indentations, or marks on your floors from your home and bedroom furniture with the use of these rubber furniture cups. | SMALL FAMILY BUSINESS. We are a small family business, based in Northern California with our second child on the way. We have created CasterMaster to be a social enterprise that helps victims of human trafficking around the world. When you support our family by purchasing from CasterMaster, you are also helping victims of human trafficking. Read more about our story on our product insert. Thank you for your support! | COMES IN MULTIPLE SIZES! We are excited to announce we now offer 2x2 inch, 3x3 inch, and 4x4 inch square CasterMaster furniture cups. This measurement is the inside of the cup and will hold furniture up to the stated inch size. For the best success, measure your furniture feet and order the CasterMaster cups closest to size to your furniture feet. Make sure to order the correct size so your furniture will not move within the cup itself. | 100% SATISFACTION & MONEY BACK GUARANTEE. We value our customers and strive to provide excellent customer service. If you are not completely satisfied with CasterMaster caster cups and furniture coasters, we are happy to refund you, no questions asked. If you need a replacement or have any other questions, please reach out to us over Amazon. We would love to hear from you!