Catalog > Electro-Mechanical Components > Panel Meters and Accessories > Accessories > Switch Knobs KNOB16-0015 Plastic Screw Type Control Knob Plastic Screw Type Control Knob • Black • Shaft Hole Size : 6.4mm Part No: KNOB16-0015 28.18 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Black Additional Information Model WTN-1189 Shaft Hole Size 6.4mm Base Diameter 23.8mm Top Diameter 18.5mm Height 15mm