Bead Tetrahedron, gold-coloured metal. If you love rivets, join the trend and "build up" cool necklaces and bracelets in geometric shapes. 9x8 mm, H. 8 mm, two holes 0,8 mm (for 2 threads). Tetrahedron = four triangles in which three sides meet at each corner. Pack with 38 pcs. ... Learn more