Name:21glass beads&7*3glass beads/pcs. Reflector:21glass/plastic beads reflector Size:74.7*13.9mm Weight:7g-10g/pcs Material:ABS+high light glass bead Life:5years Visual range:800-1000m Use install on different road stud Packing:300/bag/2000pcs/carton Carton Size:23*33*44cm/1000pcs Material: plastic film, white glass bead reflections.Used for all kinds of nail reflectors.