NITRA inline fittings start at $5.25 for a five-pack and are backed by a one-year warranty. Additional polyurethane tubing and nylon coiled hoses have also been added. Available in 100-foot packs ($13 ...

or polyurethane), thickness (two-ply hoses are the least strong and six-ply are the strongest), and the materials used for the fittings, aka the couplings (metal or plastic). We tested 13 hoses ...