Horse Hair Roto Brush - HH-100-6 - for Cross-Country Ski Waxing Fits 10mm Hex Shaft Horse Hair Roto Brush for Nordic Ski's - Great brush for hard cold waxes 100 mm width, 6mm length brush strands, strands measure 0.2mm diameter - Stiff Fits HD-10-118 Roto Brush Handle (10mm diameter X 118mm length) (not included here) Brushing by hand is great, but once you try Roto Brushing, you will love the quality and speed If you have to wax several pairs of skis, this is a great way to get fast skis in less time!