Come and see our amazing products. Whistled With Keychain is made of aluminum metal. Featured with portable, non-deformation, sound is ringing loud and clear. Great giveaway item for outdoors, adventure tourism, wilderness survival. Over 2500pcs,the price is shipping by sea. 2 1/2" L x 7/16" W Pls confirm further with us if any query about packing info, inventory status and time schedule.