Facil b_Safety whistle 24 pieces 8427

Quantity: 24 Produces sound around 3000Hz, which is easy for human ears to hear. It has a temperature range of -40℃ to 80℃ and has excellent impact resistance. ●Quantity: 24 pieces ●Dimensions: 13 x 50mm ●Material: Polycarbonate ●Estimated replacement time: 7 years ●Delivery will be in a delivery bag instead of a box.