They're available in 6,3mm and 10mm diameters and sold in 20m COILS ONLY. There is a twinned hose version where the 2 hoses are joined together to avoid them spreading over your shop floor.
They meet Standard EN559 / ISO 3821 and hold certification validated by a certified European test laboratory. Each hose carries the standard and date of manufacture. There is no expiry date. Replacement is based on its visible condition.