Feature:No obvious marks after painting, suitable for smooth base surface painting.The paint brushes are designed to hold more paint to save you time.Paint brush is suitable for surfaces in flat areas such as paint trim, doors, edging and line striping on small areas.NOTE:Keep your roller cover in good condition by removing frame after use and washing off any paint residue.Be sure to not overload the roller with paint for better result, always maintain a wet edge, do not overwork the paint with your brush and roller. Specification:Material: WoolDiameter: 23mm/0.91 inchesNap Length: 4mm/0.2 inchesTotal Dimension: 101.6x7mm (L*ID)/4x0.28 inches (L*ID) Package Content:5 x Roller Covers.