1.It can perfectly replace the original sealing for Screw Air Compressor, Gear Box and Mixer. Before purchasing, it is necessary to confirm the size (inner diameter, outer diameter, thickness), type, lip, material, and other information 2.We will not responsible if you do not compare the part with your original part before buying Shaft Hardness 255HRC Temperature:-100+300℃ 3. PTFE stainless steel PTFE filler can seal water, acid, alkali, solvent, gas, etc. D Rubber fillers can only seal oil and fat. 4. PTFE stainless steel four-way oil seal product applications: compressors, motors, thermal oil pumps, vacuum pumps, chemical pumps and other pumps, reducers, bearings, mixers, blowers, machine tools, gearboxes, crankshafts, hydraulic engines, chemical equipment and other professional equipment, Especially for traditional rubber fillers that cannot be completed, the service life of PTFE fillers is usually 20 times that of ordinary fillers.