... choose granule or block shape: EVA plastic material, High quality, high temperature performance; Synthetic rubber material, high quality, good cold tolerance2,Guarantee: 1 year, advise use ... .(2)Over 2 hours stop product, adjust Hot Melt glue temperature below 120 ° C, or turn off the device.(3 ... )Keeping the device clean, can help the temperature's exactness. Hot Melt Glue With High Quality