titanium bolts and nuts M2-M18 color:blue,red,silver,blace,colored standard:DIN84,DIN85 DIN912 DIN933 ... , DIN84, DIN85, DIN963, DIN7991, DIN6912, DIN931, ISO7380,etc. 3.Inspection:For precision measuring we would recommend the use of Digital Vernier ... M24 or bigger.Length:8mm to 115mm If you have any questions,pls feel free to contact me.Sincerely looking forward ...