Model: WH148. Shaft length: 15mm. Rotation angle: 300 degrees. Knobs for these can be found at the following links.
5Pcs WH148 Linear taper Potentiometers Angled Pins with switch 3 Pins B5K~B500K
WH148 1K 10K 20K 50K 100K 500K Ohm 15mm 3 Pin Linear Rotary Potentiometer
WH148 1K 10K 20K 50K 100K 500K 15mm 3 Pin Aluminium Linear Rotary Potentiometer
Linear Rotary Potentiometer, 15mm & 20mm, Single gang, 3 Terminal, WH148 - UK
5pcs 10K Ohm B10K Linear Rotary Taper Potentiometer
10pcs 1M Ohm B1M Linear Rotary Taper Potentiometer