Z900 / Z1000 1976 / 77. VALVE SEAT CUTTER KIT CARBIDE TIPPED. 3 ANGLE CUT AS ORIGINAL SEAT. 30 DEG 45 DEG 60 DEG. Milling in the following sizes. At 45 DEGREE + 90 DEGREE. 30 DEGREE + 90 DEGREE. Contents :- 6 pcs cutters 45,30,60 DEGREE. INTAKE = 37mm 30-45-60 Degree. EXHAUST = 31mm 30-45-60 Degree. 1x GUIDE STEM 7 mm. 1x GUIDE STEM REAMER HSS 7 mm. 1 pc ARBORS ROADS. THANKS FOR LOOKING BY.