Description Polyethylene screw knee is produced and used in fluid transfer systems with polyethylene pipes produced in the following sizes: 20, 25, 32, 40, 50, 63, 75, 90, 110, 125 mm. Features of polyethylene fittings: These connections are very safe and resistant to cracking, pressure and failure. They have high mechanical resistance to impact and external and internal pressure. They are resistant to chemicals such as acids and bases. They are also resistant to abrasion. Earthquakes do not have a negative effect on pipes. These pipes and fittings have no nutritional value and are not infiltrated by vermin. It does not require high costs to install and does not require much labor. For more information, call 09339765265 Call 09123261608.