Plastic pipe/hose (Sharmans Cross B91)

2 lengths of 'crinkle' pipe with rigid section at 1 end (for connecting?). Approx lengths 4m & 1.8m, internal diameter approx 35mm. I've no idea what these were used for - they don't look like standard pond equipment. 1 piece of smooth hose used with garden pond. Originally clear plastic but has a lot of green (plant matter?) inside and out. A little > 3m, internal diametr approx. 25mm