Designed to match most Willie & Max saddlebags. Main compartment is large with reinforcements that give this bag excellent structural rigidity. The Max Pax is easily secured any fender luggage rack using 2" hook and loop straps and 4 lace down tabs.; 2 buckle closure straps keep this bag closed tight while riding 13" x 9.5" x 10" dimensions Fender luggage rack required for proper installation