Fairchild Products Model 20 Pneumatic Precision Booster, 5:1 ratio, 250 psi [17 BAR] supply, 45 SCFM [76.5m3/Hr]@100 psi/20 psi, 30 psi [2 BAR] max output, 1/4 FPT line, 1/4 FPT gauge, 1/4 FPT signal, Viton. Thanks for looking!
eBay