Window tension spring

Hi, Mary. This is tough. We are actually going to need quite a lot of information from you, and a photo would be the most useful thing you could send us. You may want to have the handyman come back out and take these measurements, or you can take them yourself.

You will need to know:

1. The length of the metal channel
2. The weight of the window sash
3. The Series of the balance

The Series can be identified using our channel balance guide. The guide will have you choose the style of your window, identify the style/size of your balance, and compare your plastic attachments to select the proper Series. If you have trouble with the guide, photos may be the only way for us to identify the Series on your behalf.

That stamp tells us one of the three pieces of info that I mentioned: item number one, the length of the channel.

Add one to the first two digits (33+1) to get 34", which should be how long the metal bar is. If it sounds like I am using black magic to get that answer, don't worry about the details – it's a just stamp related to the manufacturing process, and it's almost always one inch less than the length.

You still need to know item number two, which will depend on how heavy your window sash is (remove the sliding frame/glass and weigh it), and item number three, which will depend on the shape and size of your plastic attachments.

You'll need to get this information together, or it will be impossible to identify the balance.