material: carbon steel or stainless steel 304 and 316 diameter at 5/32' 3/16' 1/4' 5/16' or as per customer's requirement, surface treatment from 10G to 1000G Term of payment: T/T Packing: ball with plastic foil covered and packed in carton Delivery time: 35 days after confirm sample Capacity: 50 Metric ton per month Minimum order: 50000 PCS