Discontinued 

Spring Loaded Nylon Top Guide Adjusts for Variation in Opening Height.

Requires a 1/8 inch groove in top of frame, fits a 1-5/8 inch x 3/8 inch x 5/8 inch mortise slots in door rail and contains 2 guides.

Specifications:

• Length: 1-5/8-inch
• Material: Nylon
• Mount: Top

Priced and sold in pairs.