... air pollution.DescriptionsOD: Outer Diameter;HZ: Length Of Hot Zone,CZ: Length Of Cold Zone,OL: Total Length. Order SampleStraight, OD-20mm, HZ ... -Str., 20/150/100/2.24ΩSpecificationDiameter (OD, mm)Hot zone (HZ, mm)Cold zone (CZ, mm)Overall length (OL, mm)Range of ... , in 15 days after receiving the paymentWarranty: 1 year limited Hot Sell Straight Silicon Carbide rod