HIGH EFFICIENCY WITH A GOOD WATER ABSORPTION--These Cylinder Prefilter for Pumps designed with large volume, which can provide a good water absorption and good performance PREMIUM QUALITY MATERIAL--These Pump Filter Sponges are made of material, which has a good durability to a long lasting performance ECONOMICAL AND REUSABALE--There is not necessary to change frequently, since these Pump Prefilters can be reused after cleaning SMALL SIZE AND HIGH DENSITY SPONGE--This high pressure air pump filter adopts compact density filter Perfect REPLACEMENT TOOL -- Safe voltage: 30MPa Fit for: for 30MPa Air Compressor Cleaning Method: 1. The filter elements is soaked in diluted detergent water. 2. After the filter elements is filled with water, remove and then dry and then soak into the detergent water. 3. Repeat air drying several times. 4. Do not squeeze or rub. Extrusion result in deformation of the filter core and poor dewatering. colour: white Material: fiber cotton Size: 20x35mm Package Contents: 50 x High Pressure Pump Filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.