It's a clear, rectangular strip inside a clear, rectangular package. The strip itself is about an inch tall by about 3 inches across. It has a black imprint of 4c20 or 4c20 on it. I know the ppl who lived here before, & have already found several narcotic pills in the floor. I'm worried this may be the same, & that my toddler may come across something that I have not yet found, despite my vigorous attempt at cleaning up any & all dangers. This was found while cleaning off the top of the kids bathroom medicine cabinet today. Any info would be greatly appreciated.