BLUE Pen blank Mold SINGLE CAST FOR PEN BLANK RESIN CASTING ONE MOLD FOR SINGLE PEN BLANK CASTING Lightweight Silicone Molds For Pen Blank Casting Also good for soap making or general jewelry casting Pen Kit Mall's Newest Silicone Casting Mold. Inexpensive Casting Mold Your Choice: SM003 - 3/4 x 3/4 x 3.93 INCHES LONG SM004 - 3/4 x 1.5 x 3.93 INCHES LONG Does not need mold release. Blanks pop right out.