This is a high quality replacement roller brush made by Cleavland Wood Products, the leader and highest quality generic roller brush maker on the market. MADE IN THE USA. This roller brush is identical in fit and quality to the genuine Rainbow roller brush, also referred to as a beater bar, except half the price! Fits Rainbow power heads for the following models; D3C, D4C, D4C SE, R1650C, R2800C, R4375C. Designed to fit Rainbow part number R-1866.