Contitech - SK085/137-363-01
This bellow is classed as an OEM bag as the original user put the ends on the Contitech sleeve so it was very expensive (Ã‚Â£360 ish). It's used a lot on Ambulances converted by Rohill of Andover (Now gone bust) so our supplier has had Firestone make a version. Loads have been sold into the ambulance service and never had a problem and you just re use the old piston foot. It does look very slightly different but it's just another manufacturers take.
So to recap, we will supply a Firestone bellow as a direct replacement, not a Contitech unit.
The photo is for guidance only. The bellow has been pulled fully open and would not normally be seen like this.
Dimensions etc. here - http://marcleleisure.co.uk/store/pdf/31779Edited.pdf
We've just learnt the picture shows the correct end fittings, however when the new bellow is sent out, the old bottom end fitting has to be re-used on the new bellow. The info that was given to us from our supplier said.... 'The silver alloy piston is to be re used. The bag slots into it. It might need a tug to get it off as it's been on a while'. Clearly a bit of soap will help this process. Do not use oil.