FEATURESSilicone duckbill valve - Long life with no perishing or hardeningConstant internal diameter - No restriction to flowSelf-contained mounting - 3 screw mounting posts give secure and easy installationChemical resistant - Impervious to diesel, petrol, toilet cleaning chemicals etc.UV resistant - Will not break down or discolour with ultraviolet light from the sunHigh quality surface finish - Will not discolour with green film as similar bronze fittings doLarge operating temperature range - Suitable for all marine environments, from -40°C to +110°C