These kits include steel braided gauge line and block fittings. They can be removed and reinstalled over and over again and they won't break or leak.
LONGACRE 36" STEEL BRAIDED GAUGE LINE, LON 52-45030, IMCA USRA NEW
48" -4 AN Stainless Steel Braided Oil Pressure Line Kit #1712
6AN NITROUS OXIDE LINE 48" STAINLESS STEEL BRAIDED BLACK ENDS
Longacre Steel Braided Gauge Line 24in 52-45020
20FT AN6 3/8" Stainless Steel Braided CPE Fuel/Oil Hose Line & Fittings Kits
3 BMRS Lt wt steel braided lines AP master cylinders brembo race 061725-18