The interior of the SKB ATA Mixer Safe provides a snug cradle for virtually any non-rackable audio mixer up to 40" x 31". Corner cleats securely fasten to the Velcro bed of the mixer case to hold your board firmly in place. SKB is a premier supplier of instrument and gear cases. SKB builds their products with military-spec, ultrahigh molecular weight polyethylene and premium hardware. All SKB hardshell cases are unconditionally guaranteed forever. That means if you break your SKB-4031 Universal Mixer Case, they will repair or replace it at no cost to you.