Replacing 2390 BSI 26 balance : SWISCO.com

Home Owner from California

Oct 29, 2022 8:19 pm

Hi, there. I have a non-tilt aluminium Milgard sash window and one ofnthe balances went out.

The stamp on it is 2390 BSI 26.
The length of the metal part is 24".

Which part shouldninorser please?

Thank you

2 user uploaded images

4 Replies

Tom from SWISCO

Nov 3, 2022 11:00 am

Thanks for your photos. Based on what I see here, you have either our S351-24 or S390-24, 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.

Comparison of the S351 and S390 balance shoes.

Home Owner from California

Nov 3, 2022 1:52 pm

Many thanks. It is 1-1/8". Should I concern myself with the weight of the sashe? Or the S390 spec corresponds to 2390 BSI 26 designation?

Tom from SWISCO

Nov 3, 2022 3:12 pm

The weight option is very important, yes. Your old stamp of 2390 is a little outdated, but you can weigh your sash on a scale and refer to the chart on our balances' store pages to verify the best one for the job at hand.