Pump Seal Kit 1-5/8" ID Replacement for Bell & Gossett 186543 Generic Pump Seal Kit 1-5/8" ID Replacement for Bell & Gossett 186543 For Series 1510, 1531, and Series 80 Shaft Diameter: 1-5/8" Seat Outside Diameter:2.375"" Materials: Buna/Carbon/Ceramic