Motorcycle Touring X-LARGE Top Box Tail Trunk Luggage Box &ndash; 23 x 17 x 12 In - Holds two (2) Helmets (0888) This size of Top Case is recommended for Full Size Scooters and Motorcycles Dimensions: Aprox. 23 x 16 x 12 In / 58 x 41 x 31 cm | Volume Capacity: 51L Strong Durable Plastic base included for a safe support. Comes with mounting hardware as shown in the picture. It is lockable with 2 keys. Dimensions: Aprox. 23 x 16 x 12 In / 58 x 41 x 31 cm. Volume Capacity: 51L. Strong Durable Plastic base included for a safe support. Comes with mounting hardware as shown in the picture. It is lockable with 2 keys. Holds two (2) Full Face Helmets. High Reflective on back. Base for a safe support. This size of Top Case is recommended for Full Size Scooters and Motorcycles.