The basics Fully drilled silicone opaque white cylinder earnuts slide easily onto many styles of earrings, helping to prevent loss while wearing or to secure earrings to display cards The benefits Can also be used as cushioning spacers in bead strands or strung designs. The uses Works best with 21-gauge ear wires. The bottom line These phthalate-free earnuts are CA Prop 65 and R.E.A.C.H compliant.