This deer whistle is made of , which can withstand use. Features the ABS material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This car deer whistle will make your driving safer. Features -Color:Black -Material:ABS -Size:3.00X2.70X1.70cm/1.18X1.06X0.67in - The air passing through the deer whistle creates a sound to warn deer in advance, and people and pets in the barely hear the sound. - Offers excellent durability against UV light, rain and cold cracking, ensures long term functionality . - The deer alarm for car set is made of high grade ABS, wipe the surface with screen cleaning paper before installation with double-sided tape. Can be completely removed with alcohol or glue remover. - The deer whistle is a practical tool for your driving safety in the rural area, suitable for car, trucks, and other vehicles. - Easy to operate and to install with the simple structure, to provide you with relaxed way of application. Package list: 10 x deer whistles