ProX XS-SP212115W Universal ATA Single Line Array Flight CaseProX XS SP212115W Universal ATA Single Line Array Flight Case For RCF SUB702AS Subwoofer Speaker and similar size 21x21x15 in. This Universal Pro Speaker case is designed to protect your speakers. It features a 3 8" laminated plywood with a hard shell and internal impact resistant padding, ensuring the best protection for your speakers during transit or storage. This universal case fits many brands of speakers, with interior dimensions of 21" H x 21"