Structure: Spring + Umbrella; Nozzle Size: 14mm Working pressure range: 0.2-6 bar / 2.9-87psi; Forward Direction Open pressure: 0.2 bar / 2.9psi Operating temperature range: - 30 ? to 130 ? Scope of application: cars, helicopters, ships, motorcycles and other fuel systems Medium used: diesel, gasoline, water, etc (not suitable for alcohol based material) Outer Shell: Anodized aluminium alloy; inner material used : NBR Rubber (Gasket), NBR Rubber (O-ring) and 304 stainless steel spring