No need to preheat the machine to start sealingIt automatically seals and rests to cool the seal according to the preset time.Fast sealing saves energy.Wide range of product options for various working purpose.TIS-450SPECIFICATION DIMENSION (WxDxH) : 540 x 400 x 910 SEALING LENGTH : 450 mm SEALING WIDTH : 5 / 10 mm WEIGHT : 31 kg