Pella designer series sliding contemporary glass patio door replacement roller assembly with flange; sold individually. This is a genuine Pella product.
Good Idea!
The typical patio sliding glass door uses two roller assemblies, one on each bottom corner of the sliding door. We recommend replacing both sliding door rollers at the same time to prevent extra wear-and-tear to one new roller, which will have to work twice as hard when paired with an old roller.
Good Idea! 
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