Check the listing for details. Quilting Stencils Clamshell Quilt Pattern Background & Border Quilters Template. Condition: New, Made in United States. Listed at 13.99 USD. Easy to use stencils work with quilting chalk markers, fabric pens and pencils, quilt pounce pad. Beginner or professional, these stencils are great add to any quilter's long arm quilting supplies. Set of 2 Includes : Clamshells Background and Scales Border art craft quilts stencils.