Yea, I think I get it now. Anything in the approximately 3.5 inch wide will work. There are two brands that have slightly different widths 3.44 or 3.56. Both get good reviews and both are being used on GM P30 chassis. Thanks. I don't want to use the hoses that come with the kit as they seem like more of a liability than they are worth and I don't mind climbing under the motorhome from time to time to service the air bags. I see that every parts chain sells these things. I suspect that I'll stop by O'Reilly's on the way to work in the morning and order a set. Hopefully they will have them by Saturday. We always take the RV for Christmas travel.