Feature●Spring Mechanhical Seal, Inner Measurement: 1 1/2 " 1.5 inch, 38.1MM●Pressure: less or equal 1MPa, Speed: less or equal 12 m/s, Temperature: -30 degree celsius to +200 degree celsius●Rotary Ring(Plastic Carbon/Carbon/Sic/tc), Stationary Ring(Ceramic/Sic/Tc), Secondary Seal(nbr/Epdm/VITON), Spring & Other Parts(Sus304/Sus316)●Please refer to the SECOND image photo attached for the dimension of the mechanical seal.●Widely used in Petroleum, Chemistry, refinery and auto industry, Water TreatmentDescription Spring Mechanhical Seal, Inner Measurement: 1 1/2 " 1.5 inch, 38.1MM