ti bar Specification:ASTM AMS 4921 AMS 4979D Grade: GR1 GR2 GR3 GR4 GR5 GR7 GR9 as your required size provide MTC  Titanium Rings Specification:ASTM  AMS 4921  AMS 4979DGrade: GR1 GR2 GR3 GR4 GR5 GR7 GR9Outside Dia x Inside Dia x Section Height x Wall Thk (200~400)x(100~300)x(35~120)x(40~150)(400~700)x(150~500)x(40~160)x40~250700~900)x(300~700)x(50~180)x(40~300)(900~1300)x(400~900)x(70~250)x(40~400) provide MTCwe have quality certificate issued by Baoti Test Center package: wooden case 

titanium forging rings