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I have confidently found rails for one room as per this page: http:/. ww.swisco.com/28-inch/pd/Series-351-Channel-Balances/S351-28 the stamp matches up.

The other room is the same style except longer. The stamp however reads 33ds ea 42 as per attached picture.

It wofactappear I need the 351 series 34" per this page: 33-Series-351-Balance/pd/Series-351-Channel-Balances/S351-34 however mine are in fact double spring as the ds seems to imply.

Would I opt for the 3340 or 3350 depending on weight then? Its a pretty large window.
User submitted photos of a window balance.
User submitted photos of a top sash guide.
4 Replies
Paul
Paul from SWISCO
SWISCO
Expert
Thank you for posting, and for the detailed pictures! Could you please give me the weight of the sash? That will help us come up with a good replacement balance for you. Thanks!
Home Owner from California
The double spring one weighs 29lbs.
Tom
Tom from SWISCO
SWISCO
Expert
Thank you! I think you might want to consider the 2750 option. Two S351-28 channel balances with this stamp can carry a window sash weight of 26 through 30 pounds.
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