Material can be zinc alloy or brass material. MOQ is 100pcs per design for both zinc alloy & brass materials. Common size is 38mm/ 42mm/ 45mm/ 50mm. Double sides with motifs, 2D flat or 3D cubic by custom designs. Colors can be soft enamel; imitation hard enamel or no colors. Finishing can be shiny/ matte/ antique or mirror effects. Always with 3 sides polishing. 9 patterns of diamond cut edges for options.