Miller California Patio Glass sliding door roller assembly
Lock side roller sometimes is slightly different than the back roller
Handle 6 inch overall length. - Round Clear Plex HandleA 

Description: Roller Assembly, 1-1/2 inch Steel Ball Bearing
Steel ball bearing roller; steel housing assembly.
Roller Housing Height: 1-3/16
Roller Material: Steel - Ball Bearing
Roller Edge Type: Concave
Roller Diameter: 1-1/2
# of Wheels in Roller Assembly: 1 Wheel
Housing Style: Unique Housing
Housing Width: 9/16
Roller Housing Length: 3-1/8

Helpful Article: How to Replace Rollers in an Aluminum Sliding Glass Door