Thank you for visiting. This item has been stored at home without ever being installed. Please ask if you have any questions. We do not offer discounts or respond to questions about discounts. Thank you for your understanding. Silent, flat-backed exercise wheel, 21cm. - Model Name: Silent Wheel F-21 - Size: 21cm - Features: Flat design prevents back contact - Material: Plastic - Included: Wire stand - Safety Features: Designed for stability during rotation Thank you for looking.