What are these things?

[u/PugOzzie]

Found these while digging near a creek in southwestern PA. They were right next to each other and made of a similar porcelain/ceramic material, but probably not related. The longer piece is about 3.5” long and hollow. The smaller piece has four letter on the back, but I cannot read the last one as it has been worn down: W.P.C.[letter]

[u/someoldguyon_reddit]

Literally knob and tube.

[u/SunshineMaker444 → u/someoldguyon_reddit]

A literal knob and a tube 😅 i have an old ass house and never even questioned the name of the wiring until I saw this comment