TRACPIPE: multiples of 5 metres are not cut into 5 metre lengths but supplied as one single length.
i.e.   3 x 5 metres = 1 x 15 metre length

TracPipe® Five Metre Cut Lengths.
TracPipe® is a stainless steel semi-rigid gas piping to BS 7838 suitable for natural gas, propane or butane installations.

TracPipe is also available on long length reels, in seven sizes (DN 12,15,22,28,32,40 & 50) and can be terminated with male BSP fittings.

Tracpipe semi-rigid Gas Pipe Cut Lengths