Overview Reviews Product Description The Best Drop-In Replacement Mechanical Seal. Product Videos Custom Field Primary / Mating Rings Carbon / Ni-Resist Secondary Seal Buna Seat Type O-ring (OD =1.875") Product Reviews Write a Review Write a Review × PS-517, , Type D, 1-1/4" Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *