Due to a technical problem currently affecting the Internet Explorer browser, you may not be able to open some PDF files (product sheets etc.) available on this site. To get around this problem, do not click the orange download button as shown here:
Instead, right-click on the orange button to bring up the context menu, and select ‘Save target as…’ to save the PDF to your computer.
(Alternatively, if you have a different browser available, you may wish to use that.)