The TRIAC AT POOL Set from Leister is the ideal tool set for professionals for overlap welding of thermoplastic membranes in pool construction. It includes the proven Leister TRIAC AT hot air tool, a 20 mm wide slot nozzle (article no. 107.123), a 40 mm silicone pressure roller (article no. 140.160), an 8 mm PTFE pressure roller (article no. 175.657), and a seam weld tester (article no. 174.048).