Please help identify which type of door roller this is on my sliding door window

Hello, thank you for posting,

Please start by reviewing the style of the 81-255 or 81-243 roller assembly. Compare the overall dimensions to your original to confirm the best fit! Let us know what you think and if you have any additional questions. 

We'd be happy to look into this for you as well, but we would need to see photos of the original handle set and have you write out the exact hold center spacing to compare to our inventory. Thank you.