Shur-Line 3742ZSN 4-Inch Trim Roller, 2-Pack High density white knit fabric ideal for use with the new thicker Paint + Primer paints on the market today Features excellent paint pickup for more coverage between loadings and fewer trips to the paint tray Strong and durable 100% polypropylene core Patented thermo-bond technology seals the fibers to the core to keep them from releasing into the paint Patented thermo-bond technology seals the fibers to the core to keep them from releasing into the paint Shurline Premium Select, 2 Pack, 4" Teflon Trim Roller Refill Designed with a white, knit fabric Teflon coating releases paint 30-percent faster Provides easier clean up Fits Shurline #3942 or any other standard diameter 4" roller frames