EM ceramic is said to have a positive effect on the immune system and an effect against ticks and parasites. Unfortunately, this effect has not been proven. The paracord jewelry band with EM ceramic beads is available in these sizes: — 20-30 cm neck circumference — 30-40 cm neck circumference — 40-50 cm neck circumference — 50-60 cm neck circumference Pattern: Holy Guacamole & White - Helix DNA Closure: sliding lock A leash must not be attached to decorative bands! In order for EM ceramic beads to take full effect, they should be worn for 24 hours. Once a week, you should wet them, dry them in the sun and “charge” them. This product is handmade There may be slight variations in shape and color.