Model SP21FC is a ABS plastic eye/face wash head in safety green with a built-in 2.5 gpm (9.5 L) automatic pressure compensation flow control that assures multiple soft-and-steady streams of water for flowing water pressure ranging from 30 to 90 psi. Integral flip-top dust cover is automatically released by flow of water. Flow control is easily accessible for cleaning. Supply 1/4 in NPT.