Vans typically uses -4 lines. -3 teflon is .125 ID and we do quite of bit of those to---both with -3 hose ends, and -4 hose ends to match the Vans supplied AN fittings.
All of our Beringer conversions are -3, as per Beringer. Our RV14/14A brake hoses are -3. Complicated reasosn, but the spar passthrough had alot to do with it.
Tom