Feature: Made of high quality aluminum, durable and strong. Great for monofilament line and wire leader. These aluminum crimping loop sleeves are very easy to use Specifications: Product Name: Aluminium Sleeve Material: Aluminium Main Color: Silver Tone size:1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm Package Contents: 200 * Crimping loop sleeve