This product is glow in the dark,in order to make it effective,you would better put it in direct sunlight.
Due to the darker color,the black and red may not obvious.
Item Condition: 100% New Colors: Red, Black, White, Orange, Green, Colorful, Rose, Blue, Flesh Color Gauge: 2g(6mm),0g(8mm),00g(10mm),1/2"(12mm),9/16"(14mm),5/8"(16mm),11/16"(18mm),3/4"(20mm) Diameter(Cap Size): (approx)8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm Full Height: (approx) 11.5-12mm Material: Silicone
Package: 2 piece
Pls Note: 25.4 mm=1 inch, 5 carats=1 gram , Due to different production batches of these Plugs Tunnels, the Mold may exist 0-0.5MM difference, looking forward to your kind understand.