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https://maxlinerusa.com/liners-consumables/calibration-tubes/ Calibration Tubes | MaxLiner - Leaders In Small Diameter Pipe Rehabilitation Solutions Jan 31, 2026 - Ultra-flexible, light duty PE fabric with PVC coating: for use in Open-End liner (Blind-Shot) and Pull-in-Place applications. calibration tubes leaders in small diameter pipe rehabilitation solutions https://store.astm.org/workitem-wk94228 WK94228 Revision of D3796-09(2024)e1 Standard Practice for Calibration of Type S Pitot Tubes