B5K Alpha Linear Dual Taper Potentiometer. Diameter - 16mm.
Tomy B5K Potentiometer. Type: Linear (B). Base Diameter: 16mm
AccuBell Sound / Belton BTDR-2H Digital Reverb Module. Size: 38mm x 28.2mm x 10mm
AccuBell Sound / Belton BTDR-3 Digi-Log Reverb Module. Adjustable Decay