IMPORTANT! Use with R2, R16, R17, R19 2SN 2-wire type Steel Braided Hydraulic Hose ONLY (check hose labels/markings): Not for Hoses with a steel mesh cover. “non-marking” power washer hose, water irrigation tubing, plastic tube of any kind including RV/Mobile home water lines, R5 cloth covered air brake hoses, or Super High-Pressure Skive Hose.