release：Metal hose | Release time：2023/7/19 11:10:59
There are three types of thread: external (mm), internal
(FF) and external internal (MF);
No net cover (type A), with net cover (type b);
It can be installed with connectors from various
manufacturers（ VCR.UJR.MCR Etc.);
For users who need to grind polishing products (ry0.6 μ or
less), please write TP at the end of the type number.
For example: VPA (b) 6-200-ff-vcrtp
