Application:Suitable for shrinking the heat shrinkable cap onto the wine bottle. The diameter of the SS heating tube is 50mm, suitable for wine bottles with a mouth diameter less than 45mm (1.75 in). Note:When first using the item, the smoke and the smell are normal phenomenon, it happens because the mica sheet in the machine is in the first burning. Please don't worry, it is safe and does not affect normal use. For that, all you need to do is to turn on the switch and heat for 5-10 minutes, there will be no smoke when used again. Ideal Effect:After several tests and from customers, the product can make the heat shrink cap shrink evenly, no wrinkles. Simple and adjustment, light volume, easy to move. Efficient and Convenient:Handheld PVC capsule shrinker, only takes 1-2 seconds to complete a bottle cap, can shrinks an average of more than 600 wine caps per hour. Suitable for batch, efficient, time-saving and labor-saving. Wind Power and Temperature Adjustable:With Two levels of temperature adjustable at the rear of the machine, 50-550 ℃. With two levels of wind power, can be Freely adjusted according to the thickness of your heat shrink cap.