Kodawool professional quality paint roller covers. 4" x 3/8", roller options. Quality roller covers from Premier paint roller, in New York, who has been making paint rollers for 52 years.  Best roller cover I have ever used come from Premier.  

• Superb blend of polyester and knitted wool designed for maximum paint pickup and release
• Excellent “one-coat” coverage for oil as well as latex paints
• Ideal for paints, stains, urethanes and cements
• Heavy-duty polypropylene core withstands water and solvents