This is a Hunter Douglas cord tilt mechanism for Country Woods 1" wood mini blinds. 

It fits into a headrail that measures 1" by 1 1/2" and has a 3/16" notched chevron-shaped hole.

It comes pre-strung with 1.2mm white string that hangs down 36".

Tassels for the end of the cords are available separately here.

Clear and white plastic.

Sold individually.

Hunter Douglas part # 5004810000.

This is a discontinued part, and only a limited quantity is available.