1.A/C Beadlock fittings consist of nut ,gap ,seal, ferruler, tube and valve .This kind of fittings are made of steel and AL 

2.using those air conditioning  fittings. Firstly, we should consider  the hose size, that is very important .

standard or reduced diameter of hose. if with the thick hose we will using the SB fittings and BL fittings,

IF with thin hose we should change to the RB and SR fittings type.

3.According to the elbow degree of the fittings ,there are 180 degree, 45 degree and 90 degree, 

one type size contains #6-6, #8-8,  #10-10 ,  # 10-12.#12-12.

4.BEADLOCK FITTINGS used for the bus and automotive car range.

5.Ferrule is only used one time.