Sliding Shower Door Bottom Guide and Retainer.
White plastic bottom guide acts as a panel retainer.

Attaches to bottom of shower door
Guide has hollow channel that fits over the bottom door edge.
Fits on Kinkead and Sterling Sliding Shower Doors

Material: Nylon
Color: White
Mount: Bottom
Width: 9/16 inch
Length: 2 inch
Sold in Pairs, Price in Pairs
Each pkg includes 2 guides and 2 retainer clips

To install guide -
Tilt the lip at an angle and fit into track as shown in picture
Attach bottom of shower door to guide with the snap in retainer.