Child Resistant | Ribbed Push Down & Turn Plastic PCR Caps w/ Foam Liner | 18mm - Matte Black - 400 CountPush Down and Turn plastic pcr caps can protect and preserve a wide variety of products that can fit into 18mm jars. This particular line of products comes with a ribbed texture to make them easier to open or close and also more attractive to buyers. For user safety and compliance purposes, the caps are designed to be child resistant according to all the legal standards. In addition, they come with an airtight seal to guarantee product preservation