Bell knobs. Sold individually.
SPECIFICATIONS
Overall Height: 1/2"
Base Diameter: 1"
Ideal Shaft Fit: Split Shaft
Fit Type: Push-on Fine (24 spline)
Tech's notes: "These fit perfectly on CTS pots, and any other split shaft pots with a fine spline (24 spline). They will NOT fit on solid shaft or split shaft pots with a coarse spline (18 spline.)"