6 Pcs Borosilicate Glass Tube 12mm OD 2mm Thick Glass Blowing Tubes with Cleaning Brush (Clear,4 Inch)

Very thick, great quality! I use these as a stem for soap dispensers to minimize the amount of plastic coming into contact with our product products.

They do not break easily and none were broken when they came in. They were a little thin but it hasn't been a problem for me. Don't let the black spots build up because it will cause cracks and catch fire while you are using them.

The 6 piece Borosilicate Glass Tube were and exactly as the description stated and as the positive customer reviews commented. They are heat resistant, not shattering or cracking when put in a microwave oven and are great for using as a straw in ice cold smoothies, slushies and other cold beverages. They are very securely packaged and well priced.

I ordered a 5-pack of clear 4 inch glass tubes and was very happy with the product. The price was excellent for the value. They are thick, durable, and good quality. The cleaning brush/tool that was included is not very strong/long/affective, but it was a nice touch and would be excellent if it was made for the length and width of the tubes I was purchasing.

Purchased a few times. Last order had 2 cracked.no issues other than that.