uxcell Oil Seal, TC 10mm x 18mm x 5mm Nitrile Rubber Cover Double Lip with Spring for Bearing Shaft, Black Pack of 1 10mmx18mmx5mm auspowers_batchfive pool & spa DURATECH 10 Inch Aviation pool & spa 200 – 400 ppm reading 1 color square higher55C reading 1 color square higher in the whole range60C reading 1 color square higher in the whole range Does the accuracy of the QR5 depend on the pH of the solution TC style oil seals feature a dual lip with a garter spring and utilize a rubber cover for improved sealing ability NBR Oil Seals Oil seal is a component of a machine that seals lubricants [Application] Oil seals are used to protect shafts and bearings from ingress of dirt and foreign matter and egress of oil or grease