Jim Dunlop Volume X Guitar Volume Pedal - Andertons Music Co.
Volume Pedals | Ernie Ball
Guitar Swell - In Session Audio
TC Electronic CRESCENDO AUTO SWELL Responsive Crescendo Pedal with 2-Knob Interface for Haunting Guitar Line Manipulation : Amazon.co.uk: Musical Instruments & DJ
Mooer MSE1 Slow Engine Violin Synth Pedal at Gear4music