Description Our Anderson Pens exclusive amber sac shellac comes in a 15ml glass bottled with an integrated brush for easy application. Amber sac shellac is used to attach pen sacs to the section nipple during restoration, as well as for other uses. A small amount goes a long way. Pen sacs are available in many different sizes and materials. We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers. Please note that due to supply issues, the actual shape of the bottle may vary, but will always be a 15ml glass bottle.