I need 4 sliding door rollers and 2 window balances and I cant find the right part

Hello, thank you for posting,

It appears that your roller uses a flat style wheel. If so, please start by reviewing the style and dimensions of the 81-011 roller assembly to see how it compares to your original. Let us know what you think! 

Alternate image for 81-011

Your balance resembles the Series 370 channel balance. To further review, are you able to provide the number stamped on the metal channel? If there is no number visible, we will need to know the weight of the window sash. The sash will need to be removed and placed on a scale. Thank you! 

Thank you,

For the channel balance, please review the S370-25 with a 2430 stamp option. Let us know if you have any additional questions!