What difference between 6SRB & 6, 8SBR & 8 Hose Crimper Dies?

[Flame Red]

Hello!

I tried searching but I am not finding the answer to my question.

I am going to try to learn how to make my own custom AC hoses. Got a hose crimper, and it came with 6SRB and 6, 8SRB and 8 dies. What does SRB mean?

For example, to make a #6 AC hose, when do you use the 6SRB verses the die marked just with a 6?

Thanks in advance!

[Flame Red]

I think I found it:

SBR (Styrene Butadiene Rubber) lined rubber hoses and hose assemblies are commonly used in a wide range of industrial applications for the transportation of liquids, and sometimes gases. These hoses are known for their durability, flexibility, and resistance to a variety of chemicals, weathering, and abrasion, hallmarks of a typical industrial rubber hose solution.

SBR is a synthetic rubber that is created through the polymerization of styrene and butadiene monomers. It combines the properties of both materials to provide a balance of strength, flexibility, and chemical resistance. SBR is used as the inner layer of the hose, providing protection against the conveyed fluid.

[Tim]

RB, Reduced Barrier.