Finally a correct reproduction of the original 68-70 Metal Floor Drain Hole Cover / Plug. Zinc plated. 1968 Mustangs use 4 per car. 1969-70 Mustangs use 2 per car, and vehicles equipped with staggered shocks require an addition 1 for the trunk reinforcement. 1971-73 Mustangs use 2. (Please note that these covers are not the 100% correct shape for 1971-73 model years, but they are very close.)