Is this a 9lb coil balance weight or a 6lb ??

Thanks for posting. Based on the orientation of the hardware it looks like a 9 at first glance but that is not a guarantee. The best way to confirm that this is the right replacement would be to weigh your sash. If it is 18lbs then you'll need the 9lb coil; if it's 12, you'll need the 6lb coil.