Okw numbered dials 0 9 scale 30 transparent for round wing knobs okw a 44 23 039 this okw numbered dial 0 9 scale 30 transparent for round wing knob 23mm has been manufactured using pc ul 94 hb material and can be easily fitted to a 23mm knob okw a 44 23 039 numbered dial for round knob 23mm 0 9 30 transparent scale