Non-, easy to operate fit 20w glue . Fast adhesion high strength, aging resistance, good thermal stability etc For arts crafts & hobbies: used in plastic, metal, wood, paper, leather, handicrafts, toys, electronics, furniture, shoes materials, coating, ceramics, lamps, pearl cotton, food packaging, speakers and other adhesive Material:Hot Melt Glue, Weight: 0.141536772204 Pounds, Manufacturer: Pomoflexi