http://www.jamesduff.com/eb/bushing.html
Fourth item down on the page:
"Brake Lines from Master Cylinder to the Proportioning valve or Block valve: These stainless steel braided hoses replace the old factory rubber and hard line hoses from the master cylinder to the proportioning valve. Sold in pairs. Please specify brake set up when ordering to get proper fitting sizes.
#3742-44 Stainless Brake Lines, Call for applications, $65.00"
In a perfect world, you want to minimize the flexline in the system because it historically expands more than hardline will under pressure. In reality though, braided stainless/teflon hoses are virtually as rigid as the hardlines are. Here's an interesting article regarding stainless versus rubber...keep in mind who the author is though. To summarize it in one sentence, braided hose at 4000 psi expands .01% volumetrically (too small to measure at lower pressures) and your brake system will most likely never see pressures over 1000-1500 psi max.
http://www.goodridge.net/usa/pdf/all_markets/Goodridge_stainless_v_rubber.pdf
The more modern hose designs using Teflon, braided Kevlar, a protective rubber sheath, braided stainless, and a PVC jacket and are even more resistant to volumetric expansion due to the added layer of Kevlar braid.
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