New improved Jet block has storage for 2 needles, 20 main jets, 5 pilot jets, 5 minor/idle jets, 3 emulsion tubes and 2 needles (not included). Also has built in bowl nut wrench. Now in PLAIN ALUMINUM Finish (NOT ACTUAL PIC SHOWN). For Rotax, KZ, ICC, Vortex Rok, etc. Jets and needles NOT INCLUDED.