... diameter of 114 mm, wall thickness of 2.2 mm, quality and technical standard of which have met the requirements of ... , 48mm, 38mm, 32mm, 28mm, wall thickness of 2.5 mm, quality and technical standard of which have met the requirements of ... filter elements have been applied in the powder recycling equipment, which is pollution-free with high efficient.5. Plastic parts:Plastic parts are ...