Our tin solder products are made from Grade-A pure virgin metals. Quality standards for all bar solder exceed ASTM B32, QQS-571. Packaging & Delivery Packaging Detail:10/20 spools per box / according to customer's requirementsDelivery Detail:30days after paymentSpecifications1.Diameter:0.5-5mm 2.Good humidity,bright beautiful,fast 3.High insulation resistance after cleaning 4.Less dross 5.SGS& ...