Specification:  Appearance: glassy lump
                K2O: 31-33%
                SiO2: 65-68%
                Modulus: 3.15-3.35

Packing: in 1000kgs jumbo bag

Uses: mainly for welding industry

Remarks: besides above type, we also supply the quality with other modulus and other types : powder, liquid with different modulus.