High Efficiency Coalescing Filters This filter housing range is constructed of an anodised aluminium head and with a choice of either an anodised aluminium bowl or, for lower costs, a Polycarbonate bowl. Protect your equipment and sensitive instruments from water, oil, & dirt with our high efficiency instrument filters that remove these contaminates up to 99.99% efficiency at 0.01 micron. These filters are an ideal solution as final instrumentation / valve protection given their high performance, compact design, and low cost. Applications: Great Point-of-Use Protection - Compact Design Ideal for Portable Air Systems High Flow Point-of-Use Filter Instrumentation Filter The part number structure for the variants are as follows: If the number does not contain an "A" after it, then it will be an aluminium head with Polycarbonate bowl. (e.g. Model 310 or 315) Any product that contains an “A” indicates it has an aluminium head & bowl. (e.g. 310A or 315A) If you need help choosing the correct variant, then please contact us and we will be happy to help