What can I say about this product. When i bought my glass tube heater the glass broke and i then happily notice that they sold replacement glasses so i bought the tube. When I had received it i was so happy to use it and as i go to put it on the heater part it fit perfectly fine but then as i go to put the mouth piece on it did not fit so their was no possible way of putting it on. I then emailed Vapor warehouse saying it didn't fit and they shipped me another one that had a mouth piece connected to it cause that was my problem. When i had received the second one i was so happy again. Their was a mouth piece connected to the glass cause i emailed them telling them that was my problem. It worked like a charm but then as right as i took off the mouth piece it would not go on again and as i tried to squeeze it on it broke and unfortunately i did cut myself badly. In the end i had the mouth piece they given me and it fit on the first glass. In the end everyone has their own experience. I do love the product but the experience with it was bad.