Made in the USA from 100% grey hog bristle, these brushes feature plain sanded handles and seamless steel ferrules. They may be used for hot or cold applications. When the brush begins to wear down, the wire ferrule may be removed for extra wear. You can easily extend the life of your brushes by following a few simple steps. Never let the brushes sit to dry with methyl cellulose, wheat starch, or PVA on them. Between uses or until you have a chance to clean them, leave the brushes in cold water. After rinsing thoroughly, wash your brushes with simple soap and water. Brushes are listed by diameter followed by the length of the bristles.