Markal TRADES MARKER YELLOW REFILL (434-96043) 144 MKR / CSMarks won't rub off and are weather resistant Push button holder advances the stick as needed Needs no sharpening Eliminates the hassles found with the old paper wrapped china markers Handy pocket clip keeps it in your pocket Color = Yellow Physical Form = Liquid Applicable Materials = Plastic, Glass, Meat, Wood, Cardboard, Paper Resistance = Weather Type = All Purpose Marker Refill