Volvo B 230 / B20 Heads. Valve seat Cutter Set. Carbide Tipped 3 Angle Cut. 30 DEG 45 DEG 70 DEG. Milling in the following sizes. At 45 DEGREE + 90 DEGREE. 30 DEGREE + 90 DEGREE. Contents :- 6x cutters 30,45,60 DEGREE. 45 mm – 30 Degree Top Angle Cutter For Intake. 45 mm – 45 Degree Primary Base Angle Cutter For Intake. 45 mm – 70 Degree Inner (Throating) Angle Cutter For Intake. 36 mm – 30 Degree Top Angle Cutter For Exhaust. 36 mm – 45 Degree Primary Base Angle Cutter For Exhaust. 36 mm – 70 Degree Inner (Throating) Angle Cutter For Exhaust. 2x STEMS 7 mm, 8 mm. 2x VALVE GUIDE HONE REAMERS 7 mm, 8 mm.