SPG 1/2-5/16 is Pneuflex' model number of stainless steel union straight reducer push-in fittings with connectors in 1/2" and 5/16" diameter size. All bodies are made of high grade 316 stainless steel, which is highly resistant to corrosive, making this series suitable for chemical-involved applications, widely used in food, dairy, chemical, medical and pharmaceutical industries.