Gator Cases constructs the GTSA series keyboard cases using nearly indestructible polyethylene that will protect your keyboard during transport and storage. The GTSA series cases are also equipped with a pair of TSA locking latches that are protected by impact diversion dishes; protection for the protection! Another great feature of the strong and sturdy GTSA series keyboard cases are the built in wheels (on models 61 and larger) that make transporting the case Easy. The GTSA boasts a unique wedge and block design, which allows you to customize the interior and wedge your keyboard into the most protective position. The foam blocks have a hook and loop backing that allows them to attach to the internal material and be moved into any position within the case to secure the keyboard.