These Thick, Heavy Duty Glass Extraction Tubes, are made of German Duran Schott glass.
The tube kit is shipped with two stainless steel 50 micron screens and a tool free clamp. The 12 inch glass extraction tubes are 32 mm (about 1 1/4 inches) in diameter with a 4 mm wall thickness. The 12 inch holds about 24 grams of unpacked or 32 grams of packed flower.
I know what you need! The small hole is exactly the right size for extraction. No “adapters” necessary. The conical nose gives these tubes extra strength. The other end is flared slightly to hold your filters. All tubes are annealed and made of the highest quality laboratory borosilicate glass. Our big 20 inch tubes are perfect for making large batches of concentrates and oils.
This device is intended for extracting oils and concentrates from herbs, spices, and flowers. Glass is the best material to use for oil extraction. The purchasers of my products assume all responsibility, liability and risk.
Screens and clamps are available on separate listings. https://www.theglassunderground.com/