2 extra O-Rings provide enhanced sealing Maintains structural integrity of the pipe connection Helps make the pipe more rigid when a side load is applied Suitable for hot and cold water and central heating systems Suitable for Speedfit pipes and fittings only Brand:JOHN GUEST SPEEDFIT LTD Manufacturer Stock Code:STS28 EAN Code:665628058026 Width:40 mm Height:28 mm Diameter:28 mm Weight:0.007 kg Manufacturer Guarantee:25 years Sub-Category:Pipe Inserts and Liners Colour:WHITE Brand:JG Speedfit Pack Size:10 Certification:WRAS Category:Fittings