OSP Guitar Combo Amp Flight CaseNotes Previously housed a 2x12 Fender Twin Reverb Interior dimensions: 26. 75 wide, 11. 75 deep, and roughly 20. 75 tall A OSP Guitar Combo Amp Flight Case in Very Good condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting. We always picture any and all accessories too. What you see is what you will get so please check out the pictures!