Wooster 50/50 Jumbo-Koter Roller with a 1/2" Med Pile, shed-resistant 50/50 paint roller with 50% lambswool blended with 50% knitted polyester to a thermo-fused core. For use on both internally and externally on smooth to semi rough surfaces with emulsions, satin paints, gloss and semi-gloss paints, water-proofing coatings, stains and sealers. The lambswool provides maximum paint pick up capacity and a smooth finish and the knitted polyester resists matting. Compatible with the Wooster Jumbo-Koter roller frames and Purdy Jumbo Roller Frame. Pack contains 2 rollers, dimensions 6.5 Inches wide with a 0.5 Inch (13mm) medium pile or nap fabric height.