USE : New construction / Temporary installation / Particle replacement, etc. - MJG - Product Size : 20A ~ 300A This has the separation-resistance-pipe joint way which can fix the pipe, and thus the grip ring is fixed in the inner part of Joint. It is the new way which replaces the existing joint way (welding, flange, union and groove joint) and thus is widely used in the developed country, and is the newest connection method which does not need to process the end of pipe. - MJGL - Product Size : 20A ~ 300A It is applied equally with MJG, but the length of joint is 1.6 ~ 2 times, and it can be connected to the part which the loose is caused.