Features:

2pcs sliding glass door rollers for sliding glass doors, screen doors, sliding doors, windows, vinyl patio doors, wardrobes

Made of high-quality radial ball bearings. 

2pcs rollers can withstand 330 lbs and can work after 100,000 cycles.

Just remove the broken roller assembly from door or window, then install a new one.Quick Installation. 
*Before you order: You have to measure the size of your old rollers, length, width, height and type of mount of the assembly,
to make sure it matches as closely as possible. 

Specification:

Material: high-quality bearing steel

Size: 1-1/4 inches

[Size Details]
The sliding patio door roller includes standard size of 5/16inch wheel thickness (width) x 1-1/4inch diameter. It has sturdy and enduring structure.
Color: as pictures shown

Package included:

2×Sliding rollers
Note: Not Include installation manual and installation tools

• Unscrew and remove the side stile of sliding panel.
• Gently knock a block of wedge against the bottom frame with a rubber mallet.
• Use a putty knife to pry in rail gap, then remove the old roller.
• Replace with our new roller and align F-Tab hole with the screw holes.
• Tap the side stile back into sliding panel and secure it tight with screws.
• Repeat step 1-5 on other side to replace another roller.
• Adjust rollers so door sits squarely in frame.