HSGM Form 3 Heat Cutter Blade - This is a very good blade for cutting narrow widths and diameters of webbing, cords and ropes. It is also a good blade for reaching in the tight corners of bobbins. 22mm (.866 inches) width of heated area. Suitable for use with all units. Sold individually. 1/4" thick glass is the HSGM recommended cutting surface for your cutting table. Glass does not absorb heat like other materials, therefore all the heat will go into the cutting process. Also known as the F3 blade. Recommended units to power this blade: HSG-0, HSG-1-VW, HSG-03-VW, HSG-3-VW. Made in Germany.