Model P1 fits: Classic series 2.5" heel, Signature/Party Party/C series 2" Slim/2.75"/3" heel

Model P2 fits: Classic series 3" heel

Model P2040 fits: Salsera series 2.5" heel

Model P5059 fits: Classic series 3.5" heel, Signature/Party Party/C series 3.5" heel, Salsera series 3" heel.

How to identify which style is what series:
Classic series: style # starts with a numerical number
Signature series: style # starts with letter "S"
Party Party series: style # starts with letters "PP"
C series: style # starts with letter "C"
Salsera series: style # starts with letters "SERA"
Competitive Dancer series: style # starts with letters "CD"