1, Description
Aluminum pipe joint, other name is lean pipe joint, it is different from the plastic coated pipe joints and the metal pipe and joint. It's have ifferent in material and connection mode. 
The most important is antirust and environmental. 
This is made of aluminium alloy
The aluminum alloy pipe joints conncting the aluminum alloy pipe is grabbing the pipe wall like claws. This Aluminum alloy pipe surface through special processing there is a fixed lines, unlike the other pipe so that a smooth surface. 

2, The detailed information for aluminum joint: