Alenco Sliding Window Rollers - With Plastic Housings. Sliding Window Roller and Guide Housings. Slider / Glider Window Parts and Wheel Assembly AS SHOWN BELOW - Minimum Order Is Required of EIGHT (8) EACH.  Window Rollers Guides | Slider Glider Parts:  We carry many types, sizes, styles, plastic, nylon, concave wheels, flat wheels and rollers - far too many to list and try to describe. All brands of windows used variations of sliding rollers, wheels and guide systm parts. As you can easily see - many look alike and yet are very different - single wheel, double wheel and roller parts. 

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