SKB Cases Injection Molded 4U Studio Flyer Rack Case. The big brother of the 1SKB-iSF2U! This case features a virtually indestructible, injection molded shell that is lighter, stronger, and more affordable than the previous 4U Studio Flyer, and includes innovative molded-in front and rear rack rails that provide even more security and durability for sensitive studio equipment during travel. As a larger Studio Flyer option, The 1SKB-iSF4U offers a 4U rack mount measuring 15" from front rail to rear rail which safely accommodates deeper equipment, such as the Universal Audio Apollo audio interface. It also provides a 21" x 15.5" adjustable work surface with ample room for laptops or monitors, and a specially molded exterior pattern that stacks securely with all SKB Roto Racks for maximum transport convenience. Other standard features include improved quiet-glide wheels, an easy-to-operate one-button pull handle, and TSA-accessible locking Trigger Latch System. Like all SKB Injection Molded cases, the 1SKB-iSF4U is proudly made in the USA and comes with a Lifetime Warranty. The 2U version of our Studio Flyer can be carried onto a plane, however this 4U cannot. Instead of checking this under a plane we would recommend one of our Fly Racks that is shock protected and can take the abuse of shipping or checking on a plane. This case comes with Travel Sentry Approved locking latches installed. Using Travel Sentry Approved locks allows your luggage to be opened, inspected, and relocked by TSA authorities without damage. Product Features: Impact-resistant. Innovative molded-in front/rear rack rails. 4U rack and laptop combo case. 8 rubber cleats to hold laptop into position during transportation. 15" front rail to rear rail depth. Laptop work surface: 21" x 15.5". Stacks on Standard Roto Racks. Quiet-glide wheels & pull handle. Made in the USA. Lifetime Warranty. This case comes with Travel Sentry Approved locking latches installed. Using Travel Sentry Approved locks allows your luggage to be opened, inspected, and relocked by TSA authorities without damage. Product Specifications: Exterior: Hard. Built In Wheels or Casters: Yes. Rack Units: 4. Front Rail To Back Lid: 16.75 in (42.55 cm). Rail To Rail: 15 in (38.10 cm). Rear Rail to Front Lid: 16.75 in (42.55 cm). Product Weight: 22.14 lb (10.04 kg). Exterior Length: 24 in (60.96 cm). Exterior Width: 18.75 in (47.63 cm). Exterior Height: 12.75 in (32.38 cm). Shipping Weight: 24.18 lb (10.97 kg).