before I bin it ? Bit cautious about just throwing it away as, after a similar drawer sorting session , I threw away a vital connector for a hand pump which caused much muttering.
This is sturdy black plastic , about 3” long, , with 6 little knobs on it, and two notches cut out. Peel off backing to self adhesive back.
Could be coat rack for very tiny fairies but otherwise am baffled.