Paracord and lanyard beads are made from titanium with lightweight, high strength, corrosion resistance and high thermal stability. It will add unique taste and style to your backpack, knife or other types of 550 paracord projects such a keychain, knife lanyard, necklace, etc. Dont hesitate to add it to your collection. Specifications: Material: Titanium Alloy TC4 (Gr5) Dimension: 0.897" x 0.708" (22.8 x 18mm) (Diameter x Length) Hole Diameter Upside: (0.2" )5.2mm, Below:(0.30" )7.8mm Net Weight: 0.511oz/pcs (just bead)