Witness Mag Reseals | | Valve Seat Replacement Service. Just send in your valve and we can make and fit a replacement valve seat, fit & test and return you a fully functional valve. | £25.00 + P&P | | Polyurethane Front Seal An upgraded valve to body seal, out-performing the standard O ring and giving much longer life. | £4.50 + P&P | | | |
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