Hi, this is a bottom boot out of a double hung aluminium window. I have included some scale drawings in millimetres and inches too. The spiral balance hooks in behind the two small triangular extrusions which have broken off on most of the windows so the balances can't be tensioned.
Thanks,
Steve
Paul from SWISCO responded:
September 16, 2014
Thank you for posting, Steve. I'm afraid we do not have a match for this shoe, but you may be able to substitute with our 15-017. Check it out and see what you think.
A home owner from Sydney, Australia says:
September 19, 2014
Hi Paul, Thanks. I will order a couple of those and see if they suit.