•Length:137MM . diameter:15mm •No tar and other carcinogenicsubstance. •Harmless to other and the environment. •No danger ofsecond-hand smoking. •Smoke in a public place. •Enable smokers toabstain from smoking non-painfully. •Give up smoking in 3 month ifyou want. •Save the smoking cost 80% each year. •No ignition and nofire hazard. •Working temperature: ambient temperature from -5’C to42’C