Duoling's registered brand"FULENG" has been assessed ''WELL-KNOWN MARK'' by Chinese government. Abide to SAE Standard and ISO9001. Specifications: S930, S780, S660, S550, S460, S390, S330, S280, S230, S170, S110,S70 The steel shot produced with special and unique technique has particle-size uniformity, stable performance and good abrasion-resistance. Package: 1. Iron Drum 2. 25kg one waterproof bag, 40 bags one wooden pallet or 80 bag one wooden box. 3. 1000 Kg/Bulk bag 4. Other package