Composition: The label indicates it's 63% tin (Sn), likely with 37% lead (Pb), a common alloy for electrical soldering.
Diameter: The wire diameter is 2.3 mm.
Flux Core: The label includes "ヤニ入り" (yani-iri), meaning it contains rosin flux, which helps the solder flow and adhere properly.
Usage: Solder wire is melted using a soldering iron to join metal components, wires, and circuit boards.
Melting Point: 63/37 Sn-Pb solder has a melting point of 183°C (361°F).
Features: This type of solder is known for its good wettability and flow properties, creating strong and reliable solder joints.