This Piece B and Piece C 2 (two) piece set has handy "cut in" sections for easier cutting. No need to draw and cut with scissors in the corners.
Colored interfacing piece is handy for easier reference. Hole for placement of snap or closure hardware makes it an easy reference for placement.
Color is handy for easy reference for the interfacing piece. Colors may vary from picture and subject to color availability.
Piece A, 2 Piece A set and interfacing piece sold separate.