... :45#carbon steel high quality,great variety of goods size:7-9,8-10,11-12(13-14),15-17,19 ... standard,Quanlity can reach the GB,DIN & ANSI standard4. Size: 7-9,8-10,11-12(13-14),15-17,19 ... -21(1/4-5/16, 3/8-7/16,1/2-9/16,5/8-11/16,6 ... request6. Payment: T/T or L/C at sight7. Delivery: in 30 days or according to your order quantity8.Origin:China ...