I don't know about pricing, but the 16 ft hose (5 m) supplied with my Fein Turbo II vac (about 6 years old) is a perfect fit into the Festool vacuum machine and vice versa. The Fein hose is ~36mm, and much more flexible than the Festool AS hoses in 27mm or 36mm diameter -- of this I am certain as I have all of these and some 50 mm AS Festool hose, too. The tool end of the Fein hose will directly fit the TS 55 saw and OF 1400 router, but not the Festool machines that have an oval shaped DC outlet (such as Deltex 93 sander and OF 1010 router) which require the elastomeric tool end fitting supplied with Festool's 27mm hose. The Fein hose can be used with Festool machines which have a 27mm round DC outlet (including LS130, ETS 125 and ETS 150 and RO 125 sanders and any others with such round DC outlet) by first installing a rubber O-ring on the DC outlet nipple then pushing on the Fein hose. I frequently do this with my RO 125 sander when working overhead due to its lighter weight and greater flexibility, plus the hose-to-nipple connection gains a bit of swivel action as well which facilitates getting into tight quarters. I have yet to be shocked when using the Fein hose in place of the Festool AS hoses, although I have noticed some static buildup when working in low humidity conditions in my heated shop during Ohio winters.
Dave R.