Balanced Silicon Carbide to Silicon Carbide mechanical seals for long life Օ Precision radial contact ball bearings are flush ground for back to back mounting Labyrinth system for bearing protection with tapped vent ports Օ Full flow design ensures minimal pressure drop 300 series stainless rotor and anodized aluminum housing for corrosion resistance > Flow, gpm21.614 21.6 Speed, rpm 12,000 12,00010,000Seals SC to SC SC to SCTCTapped Vents > Yes NoYesHousing Design One Piece One PieceTwo Piece > (SC=Silicon Carbide, TC=Tungsten Carbide) 14440 Azurite Street NW, Minneapolis MN 55303