Slide Glass Door Roller 1-1/4" Steel Ball Bearing, Prime-Line D 1688 (2-PACK) Restore smooth operation to your sliding patio door with the Prime-Line D1688 1-1/4-inch steel ball bearing roller assembly, a high-quality replacement roller designed for durability and precision performance. Commonly used by leading manufacturers such as Nu-Air, Bennings, and Scotty, this roller is an exact-fit solution for a wide range of sliding glass and patio doors requiring reliable, long-term functionality. Featuring a 1-1/4-inch diameter concave steel roller, this assembly ensures optimal track alignment and reduced friction for effortless opening and closing. The roller is mounted in a stamped steel housing with a plain back design, allowing for flush mounting into the door?s bottom rail. Integrated ball bearings provide smooth, quiet rolling action and resist wear, even under heavy use or in dusty environments. A key feature of the D1688 is its rear screw adjustment mechanism, which allows for fine-tuning the roller height after installation. This enables proper door alignment, prevents dragging, and ensures a tight seal against weather and drafts. The yellow zinc plating offers enhanced corrosion resistance, protecting the steel components from rust and extending service life in both indoor and protected outdoor settings. This single-pack roller comes ready to install?no assembly required?and includes one complete roller unit. Measuring 0.56" x 2" x 1.18", it fits standard roller housings and is ideal for DIY repairs or professional maintenance. Weighing just 2.39 ounces, it adds minimal weight while delivering maximum support and stability. Features - 1-1/4" diameter concave steel roller for precise track engagement - Ball bearing design ensures smooth, quiet, and durable operation - Stamped steel housing with plain back for flush mounting - Rear screw adjustment allows for fine-tuning door height and alignment - Yellow zinc plating resists corrosion and extends lifespan - Direct replacement for rollers used by Nu-Air, Bennings, Scotty, and others - No assembly required ? ready to install out of the package - Ideal for sliding glass and patio doors in residential applications - Supports proper door seal and prevents dragging on threshold - Compact size: 0.56" x 2" x 1.18" Specifications - Brand Name: Prime-Line - Model Name: Prime-Line D1688 - Part Number: D 1688 - UPC: 049793016881 - Global Trade Identification Number: 00049793016881 - Product Type: Sliding Door Roller Assembly - Size: 1-1/4 in. - Color: Yellow Zinc - Material: Steel - Style: Classic - Assembly Required: No - Measurement System: Inch - Product Dimensions: 0.56 x 2 x 1.18 inches - Item Weight: 2.39 ounces - Item Package Quantity: 1 - Included Components: Sliding Door Roller - Manufacturer: Prime-Line Products - Country of Origin: China Product Application The Prime-Line D1688 roller assembly is engineered for use in bottom-hung sliding patio doors requiring reliable, adjustable support. It?s ideal for repairing doors that stick, drag, or fail to close properly due to worn or damaged rollers. With its proven compatibility and durable construction, this roller delivers professional-grade results for homeowners, handymen, and contractors seeking to restore smooth, secure door operation with minimal effort.