1/4" x 80/50, & 80/70. HARDENED STEEL SPRAY TIPS These tips are to be made of case hardened steel, because they will last much longer than regular steel tips or stainless steel. Heat treated hardened tips give my customers longer tip life & less down time All treated nozzles are case hardened to a .020 min. case depth with a 60 HRC minimum surface hardness. Will send samples if required, want quantiy pricing on spray nozzeles