KN-19 work great with 6.35mm shaft. It’s also with white line on the outside for great visibility. It’s easy abd secure fit because that design to set directly on the potentiometer’s ridges. There are two kinds of shaft for this knob. Original 6.4mm knob is with brass insert and set screw. This knob have 18 teeth shaft as well. Many colors are available, as customers like. Specifications: Package includes: 10pcs x Knob. Material: ABS Base Diameter:19mm Height:15mm Inner Diameter:15mm Operating Temperature:-25℃~+85℃
