Shur-Line 8105RFN Roller Tray Set Premium kit features high density knit covers ideal for use with heavier Paint Plus Primer paints High density knit fibers hold more paint for fewer trips to the paint tray 100% polypropylene core with patented thermo-bond technology ensures virtually lint free performance Brush features Nylon/Poly blend bristles for excellent coverage Brushes chemically tapered filament tips provide excellent cut-in and an ultra smooth finish Paint sticks to the wall not to the roller Paints 30% faster