John Guest Speedfit 12mm Pipe Insert Push Fit Semi Rigid (Pack of 50)Creates a rigid connection when fitting Speedfit pipe to a Speedfit or compression fitting. Always use a JG Speedfit pipe insert when connecting Speedfit pipe to a Speedfit push fit fitting or when connecting to a compression fitting. Inserts play a vital role in providing extra support to pipework, ensuring that the ends of the pipe are kept nice and round, and minimising any loss of shape that can occur when cutting. Designed and manufactured in the