uxcell 4 Inch Mini Resilient Sponge Paint Roller Cover Nap 1/4" Hole Dia-Maximal Coarse 4 Inch Length Paint Roller Cover Cover Material: Maximal Coarse Sponge Sponge roller cover, large adsorption capacity. Used with elastic paints, fireproof paint, composite relief paint, granite-like paint, etc. Wonderful replacement fits for 3.5 Inch long roller frame