As you can see from the photos this bag fits the standard 17 and 3/4" X 4 and 3/8" reverb tank just fine. Velcro closure on the bottom. Plenty of slack for installing 'hold down' screws.
This generic bag fits Prosonic, Blues Deluxe™/DeVille™, Hot Rod Deluxe™/DeVille™, Showman 50, '94 Twin®, Custom Vibrolux®, Custom Vibrasonic, Pro Tube Series Twin®/Concert/Pro Reverb, '63 Vibroverb®, '65 Twin Reverb®, '65 Deluxe Reverb®, '65 Super Reverb®, Vibro-King®, Dual Professional, Super-Sonic™ Series, '65 Twin Custom®, Princeton® Recording Amp, Steel King™, Jazz King™, and '65 Princeton amplifiers manufactured '86-Present.
Reverb unit not included.