Isi marked - as per is : 636 type a rubberized fabric reinforced rubber lined (rrl) fire hose. Jacket is made up of 100% synthetic yarn for extra strength rrl alone can with stand 100 psi pressure heat and abrasion resistance. Product code no. Sizes working pressure psi burst pressure psi fh-fc-38 1 ½” 205 570 fh-fc-50 2” 205 570 fh-fc-63 2 ½” 205 570 fh-fc-70 2¾” 205 570