Metal spirals Metallic spiral 4: 1 48 mm A4 - Special Collection DHP EM-41-A4-48-ESP Metallic spirals for Binding Step 4.1 (6.35 mm), 48 mm diameter and DIN A4 format. Available in color silver glitter, golden gold, bronze, rose gold, blue, blue ocean, aquamarine, green, yellow, yellow gold, orange, fuchsia or lilac. View