Interstate Pneumatics, 1" Heavy Duty – Metal Bowl Filter. General purpose filter protects tools and equipment by removing most solid and liquid contaminants. This may include dust, dirt, pipe scale, rust, liquid water and bulk oil. A 40-micron filter element removes the smallest of particles. See-through bowl with metal guard allows easy monitoring of fluid level while protecting unit against impact. Quick-release bowl and quarter-turn drain for easier use. Help prevents costly damage to air tools caused by rust, scale and moisture. Efficiently traps moisture while passing through clean, dry compressed air. Convenient minimum installation time into your compressed air system. Accessories for these filters like Steel bowl kit, 5 & 40 Micron filter, Drain cock, Mounting bracket, sight glass kit, Panel mount nut, Diaphragm & Valve Kit are also available. It can be freely combined with other air source treatment products.