Features:- Universal Tail Box - 18" x 15" x 11" Motorcycle Tour Tail Box features 30 L large capacity for easy fitting a large sized helmet or carrying your necessary gears like raincoats or water bottles; With a universal mounting plate allows to attach the tail box to motorbikes, scooters or other motorcycles with frame; Suitable for commuters or travelers- Quick Release Button - With a quick release button helps to easily detach the tail box from the bottom plate, allowing you to take it out and conveniently carry with your personal items wherever you go- Durability - Made of PP material, it provides wear and impact resistance, offering strong support for bearing heavy loads, ensuring a long lifespan- Safety Assurance - Reflective strip on the tail box makes it visible when riding at night, providing a safe ride; Safety lock with 2 keys adds security to your personal items without theft; Flat backrest offers support to rest your back- Easy to Install - Easy to install the universal mounting plate with included screws, no need to drill, then simply attach and secure the tail box with 1 buttonSpecifications:- Overall Dimension: 17 11/16" x 15 3/8" x 11" (45 x 39 x 28 cm)- Maximum Internal Length: 15 3/4" (40 cm)- Minimum Internal Length: 11 1/4" (28.5 cm)- Internal Diagonal Length: 16 15/16" (43 cm)- Inner Height: 5 7/8" (15 cm)- Bottom Plate Size(LxW): 11 7/16" x 9 1/16" (29 x 23 cm)- Bracket Length: 7 1/16" (18 cm)- Capacity: 30 L- Material: PP- Net Weight: 6.6 Lbs (2.99 kg)Package Contents:- 1x Tail Box- 1x Bottom Plate- 2x Keys- 2x Brackets- 4 Sets of Screws- 1x ManualNotice: - Before purchasing, please measure your helmet size and make sure the height of your helmet is less than 9 13/16".