This image is from a dwg supplied by the manufacturer. Could anybody please tell me how to derive end thickness of the taper for the inner jaws (17mm length)?
Basic dimensioning question
@Anonymous
Many times vendors leave off dimensions so their product is not manufactured by others (meaning its done that way to protect their design or Intellectual property).
Is the image you are showing in your posting based on an AutoCAD drawing file? If you have a "DWG" file and have Inventor 2016 or newer, you can use ANYCAD and use that 2D information to project into your part file of this extrusion.
If its based on a PDF and the PDF information is newer and you have access to AutoCAD 2017... Well you can use that version to convert the PDF information into a DWG file format. And then use ANYCAD to project geometry form.
If you just have an image of it and you have no way of measuring the information in CAD or on the actual product, well you will need to "fudge" it or ask the vendor nicely 
if they will provide this information to you.
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
I think @Anonymous was already on that path (https://forums.autodesk.com/t5/inventor-forum/frame-generator-profile-with-3-individually-selectable-drawings/m-p/7468076#M664058).. 
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.