Arnold Grummer's 8 Ounce Bag of Pre-Shredded Cotton Linters - Get detailed paper casts with Brite White Cotton Linters. Linters are pre-shredded and easy to use. Simply add water to cotton linter in a kitchen blender to hydrate. Complete instructions on package for casting. 8 oz bag makes 50 medium casts (4 x 5 inch size).