The product is a CD compilation of the greatest hits of the glam/hair metal band Ratt, released in 1991. The release title "81 91" indicates that it includes songs from the years 1981 and 1991. This CD features popular songs from the band's early years, making it a must-have for fans of classic hair metal music. Made in the United States, this collection showcases the band's iconic sound and style, perfect for any music lover looking to rock out to some unforgettable hits.