Material type= White PVC
Spline count= 24 splines for US spec split shaft pots
Mount type= Push on
Lettering= Black on Silver Cap
Numbering = Silver
O.D. of knob base= 1 9/64 in. (28.9mm)
O.D. of center cap= 29/64 in. (11.6mm)
Height of knob= 39/64 in. (15.9mm)
Very cool vintage style knobs. I pack well and ship quickly.