Aixiz is the name of the company,
www.aixiz.net
They are producing their diode housings, sometimes reffered to as "modules", they are machined pieces of chromed brass which hold the diode and lens together.
Diode is pressfited in it's pocket, and lens is threaded through the other end, towards the diode.
Further more, entire assembly can be put in machined piece of aluminum to act as even bigger heatsink, needed for 445nm and 405nm diodes used in our community.
@Ash = easy for you to say, when you know it all. Put yourself in noob's shoes and try to actually find that info. Ain't that easy, is it?