Kuchenprofi Sand Tea Timers, Assorted, Set of 3 3-Piece; set includes a 3, 5 and 7-minute timer Green color for 3-minute; black color for 5-minute; red color for 7-minute Each works like a mini-hour glass; turn upside down and when the sand drains to the bottom, time's up Glass and plastic; each measures 3-Inch high by -3/4-Inch diameter Wipe clean