What is this

Found this little plastic barrel. One end has the cat yellow color with ZD-1.8 on the face. The rest is solid black bc it was in my oil pan. It’s the width of a dime. So it looks like a stack of dimes about an inch tall with one face yellow and
ZD-1.8 on it. I just had my head changed. I’m hoping it was something left over. I just changed my oil and it came out.

 

I apologize. I have a 2007 379 with a c-15 acert

 

Would this b easy to find or find out if that’s it? It doesn’t feel like rubber. I put a hacksaw blade to it and it’s solid. Like a plastic maybe. But I’m not going to doubt you, that’s why I’m asking. Where do I need to look for these plugs?

 

i just checked. All 3 of the plugs are in place. And this is the first oil change after I had my head replaced. I’ll have to wait til Monday to call rush and ask if they replaced those plugs for the dipsticks.

 

I just didn’t want to wait til Monday and lose a day of work. I have my own authority as well and it’s tough. Missing a days worth of work after missing a month replacing that head and the cost of it.