Check the listing for details. Balsa Strop Standart 150 x 24 x 3.5 mm. Condition: New. Listed at 17.50 USD. DESCRIPTIONBalsa Strop is an efficient way of final polishing a cutting edge using an Hapstone knife sharpener. A balsa strop enhances the cutting edge by correcting small nicks and smoothing grooves. The working surface is made of polished balsa wood mounted on a high-quality aluminum blank.Balsa strops are available in standard and narrow sizes. Narrow strops (12 mm wide) are suitable for recurved blades.Balsa is the softest and lightest of all commercial woods - nothing else comes close to it. Balsa keeps its flatness better than leather and prevents the blade becoming convex when used on abrasive compounds.StandardBalsa on the blankWorking area 150 x 24 x 3.5 mm (6" x 1" x ⅛")Suitable for regular blades Working with balsa is similar to working with leather. Gently slide the cutting edge over the strop, repeating 20-30 times for each side of the blade. The motion should avoid damaging the balsa with the cutting edge.