We're not just casters anymore ... Master provides a variety of products to protect you & your office furniture. As the industry's leading supplier, we provide replacement casters for 99% of the office chairs on the market today Master Manufacturing Company is a certified W.B.E. (Women's Business Enterprise) & a member of the National Minority Business Council. Founded in 1951, Master is owned by Iris R. Rubinfield whose leadership & commitment has developed a small, family-owned operation into a multi-million do / far business with unique, problem solving products. Located in an economic “Enterprise Zone” of Cleveland, Ohio, Master is committed to providing jobs for inner city residents with more than 98% of minority employees. Master's long-standing reputation for quality products & excellent customer service has made them a leader in the office furniture & supply industry. The ComfortMakers Seat Cushion, Ergonomic Back Support. Measures 17" wide x 17-1/2" high x 2-3/4"deep. Unique, patented system of self-adjustable foam inserts can be arranged & rearranged to fit all body shapes & sizes, providing “personalized” comfort & support. Can be used as a back cushion to provide proper seat depth. Hook & loop strips hold cushions in place on fabric covered seating, an adjustable strap is provided for smooth surface seating. Ideal for use in the office, home, automobile, airplane or anywhere. Made in the USA from flame retardant, washable fabric for easy care. Designed, tested & approved by a leading Orthopedic Specialist. Helps reduces back strain & fatigue caused by improper seating posture. Forward tilt of the seat cushion helps relieve stress from the lower spine & pelvic region. Gray Color