Advantages of tubing: Compression fittings are popular because they do not require soldering, so they are comparatively quick and easy to use. They require no special tools or skills to operate. They work at higher pressures and with toxic gases. Compression fittings are especially useful in installations that may require occasional disassembly or partial removal for maintenance etc., since these joints can be broken and remade without affecting the integrity of the joint.They are also used in situations where a heat source, in particular a soldering torch, is prohibited, or where it is difficult to remove remains of water from inside the pipe which prevent the pipe heating up to allow soldering.
greenDracaena compression fitting: greeDracaena fitting is perfectly designed for anti-off function. It prevents any leaking and slipping from the tubes. With the Fixing method which is known as Hexagonal M8 fixed (tool please search for “wrench” in the store) and built-in silicone sleeve sealing method, the product is advanced compared with other fittings. Surface is treated with electroplating also brings the best visualization for your design 
 
Specifications:
- Height about 22mm (including thread) * diameter about 22mm
- Supports PETG/PMMA hard tube with outer diameter 12MM - 14MM - 16MM 
- Thread: outer G1/4
- Accessories: Black Nitrile Butadiene Seal (back up)
- Material: high quality brass body + aluminum alloy outer ring