In its early years, the company manufactured the very best handmade lambskin roller covers. As the company continued to grow, it expanded into synthetic roller covers spiral wound on various cores phenolic, plastic & closed cores system. Today, ArroWorthy is one of a select group of companies able to manufacture synthetic roller covers on a polypropylene core, which are 100% solvent resistant. Polypropylene is proven to be a more solvent resistant resin than phenolic & PVC.