The 6050 swivel is compatible with Richardson Seating's 6050 series counter stools. The 6050 series do not have backs and rotate 360 degrees. The swivel is made of a 7 inch plate and a center pipe that is approximately 3 inches long and 1" in diameter. We carry several swivel models to fit any series bar stools manufactured by Richardson Seating. If your swivel is old and worn, replace it with a brand new counter stool swivel. If you are unsure who manufactured your counter stools, please message us before purchase. We don't sell very many of these because it would be unusual for this part to wear out. Please check with us before purchase.