Undercoating System is ideal for applying Rubberized Undercoating, Heavy Duty" Anti-Rust and even Bed Liner material. Applies directly from the adjustable "gun nozzle, or replace the nozzle with one of the 24"" long by 7/16"" diameter "flexible wands with straight or 90 degree spray tips. Also included in this" kit is the 16" rigid wand attachment and a matching plastic gun cup as well as a quart and an aerosol of Eastwood Undercoating. Gun requires 40-60 psi @ 5-6 "cfm.