COE 85 Fusible Glass Rods, for DIY Creative Fused Glass Art Pieces, GreenSize: about 17.3~50cm long, 2~5.5mm wide, about 13pcs/bundle, about 250g/bundle.Glass fusing is the joining together of pieces of glass at high temperature, usually in a kiln. Operating Temperature: it is usually done between 820â and 830â. Usage: make beautiful fused glass and slumped to art pieces.