We Send The Package By 4px. (SAFETY) Features:Brand New and High QualityThis pack flashing golf balls can flash with beautiful colorPerfect for night golfing. Specifications:Color: WhiteFlashing color: Blue/Green/Red/Orange (optional) Flashing time once: 4 minutesIt can working(flashing) 36—42 h.Golf structure: Two-Piece-Ball (Distance balls)Diameter: 4 cm Weight ：45gPackage Including:2 X Flashing golf balls