Greatly Compatible- 4-inch long and 0.27-inch diameter hot glue sticks fits most of glue guns on the market. Safe to use with both high and low temperature glue guns. EVA material, with strong viscosity, easy operation, aging resistance and good temperature resistance, will not harden after long-term storage. Tough & versatile, Hot Glue Sticks provide a long term hold even on hard to bond surfaces. 7mm glue stick is used for 12W, 20W, 25W and 30W small glue guns (below 30W, including 30W); 11mm glue stick is used for 60W, 80W, 100w-200w (above 60W) Please Note : Avoid exposing the hot melt adhesive stick to the sun for a long time. The nozzle of the hot melt glue gun and the melted glue sticks are at a high temperature during operation. Do not touch them., Manufacturer: sourcing map