The iSeries 3i-2015-7TMP features a custom, high quality foam interior that's been form cut to accommodate the Fender Tone Master Pro Guitar Workstation. There are accessory compartments below the workstation and behind it providing space for all the gig necessities. The accessory pocket behind the workstation measures 11” x 3.45” x 5.5” and is large enough to hold the Mission Engineering Fender SP1-TMP Expression Pedal, but can also be used for other accessories such as a microphone, wah pedal, volume pedal, or other equipment. The space below the workstation measures 10.5” x 10.5” x 1.5” towards the back and 10.5” x 10.5” x 3.25” towards the front of the case and is perfect to hold the power supply, extra cables and other small accessories.