The first add-on to the very popular slimline envelope builder contains 4 dies that, when used with the Slimline Envelope builder, will give the option to make a 9x4x1” box, a flap that allows for a long opening to the envelope, and another die that will give a V-flap opening to the envelope.

For a more stylized envelope, use any slimline length border die along the edge of the new flap design for a fun decorative envelope flap.

This die set is made of high quality 100% carbon steel.