Specification | Single head for 2 hours: height 3.5 cm * width 6.0 cm, 64 pieces in a box, Single head for 4 hours: height 4.5 cm * width 8.3 cm, 48 pieces in a box, 6 hours per head: height 5.5 cm * width 8.3 cm, 48 pieces in a box, Double head 4 hours: height 4.5 cm * width 8.3 cm, a box of 48, Double head 6 hours: height 5.5 cm * width 8.3 cm, a box of 48, 3 heads and 4 hours: height 4.5 cm * width 8.3 cm, 48 pieces in a box, 3 heads for 6 hours: height 5.5 cm * width 8.3 cm, 48 pieces in a box, 4 heads and 4 hours: height 4.5 cm * width 8.3 cm, 48 pieces in a box, 4 heads for 6 hours: height 5.5 cm * width 8.3 cm, 48 pieces in a box |