Filters Filters Home > Office Supplies > Classroom Materials > Whistles Classroom Materials Whistles Classroom Materials Items [2] Champion Sports 401 Sports Whistle, Heavy Weight, Metal, Silver CSI401 Sports whistle with metal split ring. Mfg Number: CSI401 Manufacturer: Champion Sports Price $24.62 X Add to Cart Champion Sports CSI601 Sports Whistle, Medium Weight, Plastic, Black Champion Sports CSI601 Sports Whistle, Medium Weight, Plastic, Black - 601 Manufacturer: Champion Sports Price $7.58 X Add to Cart