Product Name: Mechanical Seal Gz5820 Model NO.: HF 2050 Standard: Standard Shape: O-Ring Performance: Wear Type: Rotary Seal Application: Equipment Seal Material: metal Style: Mechanical Seal Shape (for Gasket): Ring Gasket Function: Rotary Sealing Transport Package: CTN Origin: Wuhan HS Code: 8484100000 Product Description The products are made of high alloy steel, and it wears well and keeps the precise size.The working surface hardness: HRC 60-72Roughness of abrasive surface: GB1031-68, Ra0.02- 0.032 µ MWide range of temperatrue of application: From: -50Cto 120C