Steel construction and ultra small. Dimensions are approx. 8" (203mm) wide x 5" (127mm) deep x 1.5" (38mm) tall. The overall depth including the mount is 8.25" (210mm). If you like to travel light, your name is written all over this miniature luggage rack. Can universally be installed on many bikes with the rear seat mount bolt. Max weight limit 5 lbs (2.26kg).