4000/5000 Series Belt Carry Case - Black, This sturdy padded nylon case lets you build a Kestrel 4000 Toolkit perfect for your needs and still carry it on your belt with ease. The top flap features a hook/loop closure and a special window designed to keep the Kestrel 4000 sensors continuously exposed to the outside air, ensuring accurate logged readings. The durable elastic loop on the side of the case is perfect for carrying a small flashlight or other tool. No need to find yourself in the field with dead batteries -- an elastic battery loop inside securely holds two backup AAA batteries. Manufactured exclusively for NK by Nitelze, this case features their patented J-hook made of sturdy nylon/fiberglass composite. This hook accommodates up to a 2 1/4" belt and also attaches reliably over a waistband. For complete flexibility, this case includes a strong hook/loop strap to allow for easy mounting on a backpack or harness strap. Available in black only.