window parts
It looks like you're looking for two different style balances. The longer of the two assemblies has wings on the nylon fittings while the shorter of the two assemblies lacks them entirely. This may seem like a minor distinction but it is important.
Concerning the longer balance, you have either the Series 380 or Series 385, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.
For the shorter balance, you face a similar choice, but this time between two different Series than before: The Series 380 and Series 385. I will share another diagram for these particular products that you can use as a reference to find a match. You'll note that the nylon fittings lack the same wings as the previous two.
