This is a new set of firewall cowl vent black plastic screens.  This is a 3 piece set for 1968-72 GM A body without air conditioning. These screens snap into the holes in the cowl.  Check our other listing for screens for cars with air conditioning.
Per California Law (Prop 65) we are required to put the following warning on all our listings.
WARNING:
This product can expose you to chemicals, including lead, which is know to the state of California to cause cancer, birth defects and or reproductive harm – www.P65Warnings.ca.gov