Parker's 20 series fittings are a two-piece field attachable style fitting which enables you to quickly and easily make hose assemblies right on the job site without special tools.The fitting series when coupled with Parker's No-Skive hose provides convenience and shorter assembly time. The 20 series fittings are compatible with transportation, liquefied petroleum gas and marine fuel & brake engine hoses. 20 Series, Field Attachable Shell -10 Hose, Steel.