Because I don't use it often. This is a used item, so please refrain from purchasing if you are sensitive to such things. Non-smoking. No pets. [Description] Magic arm made of aluminum alloy and stainless steel, with an opening range of 15-52mm, suitable for various applications. - Brand: NEEWER - Model: ST25C - Weight: 230g - Material: Aluminum alloy and stainless steel - Opening range: 0.59-2.1 inches (15-52mm) - Size: 5.4" x 13.8" (13.8cm)