GF Primofit 20mm Spares Pack for PE Pipe (NBR Seals) – 775958961 This spares pack contains the replacement components needed to refurbish and reuse a 20mm Georg Fischer Primofit Ga compression fitting on PE or PE-Xa gas pipe, across all SDR/S ratings. It includes an NBR seal along with the other wearing parts needed when a fitting is disassembled for maintenance or pipe rework — the seal, washer and locking components typically can't be reused once a fitting has been taken apart, even if the body and nut show no damage. This pack is supplied without insert stiffeners. Insert stiffeners support the pipe bore inside a compression fitting and are generally required for a secure connection on PE pipe — if a stiffener isn't already fitted or available from the original installation, one should be ordered separately alongside this spares pack.