Sliding Collar for a Parasol

1 . 1 is a front side view of a sliding collar for a parasol showing my new design;

1 . 2 is a rear view thereof;

1 . 3 is a left side view thereof;

1 . 4 is a right side view thereof;

1 . 5 is a top view thereof;

1 . 6 is a bottom view thereof;

1 . 7 is a top, front, right side perspective view thereof; and

1 . 8 is a top, rear, left side perspective view thereof.

The broken line showing of a pole, ribs and screws is for the purpose of illustrating environmental structure and forms no part of the claimed design.