The 48-52mm ring adapter easily screws onto the front of any 48mm lens, and converts the thread size of your lens to the thread size of any other 52mm accessory (such as filters, hoods, flashes and lens converters Made of anodized black aluminum (metal). Color: Black. Extremely solid and lightweight. Specifically designed for your camera for a tight and secure fit. No wobbling or cross-threading. The first number is always the lens thread size, the second number is the filter size of the accessory. If the first number is bigger, itand x27;s a step-down ring. If the first number is smaller, itand x27;s a step-up. A must have accessory to unlock the full potential of your camera! NOTE: PLEASE VERIFY YOUR CAMERAand x27;S LENS THREAD SIZE BEFORE ORDERING. This kit is compatible with 48MM lenses only. Lens sizes vary regardless of camera brand or model. Your cameraand x27;s lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a andquot;andquot; (diameter) symbol. NOTE: The pictures in the product are for reference only, please refer to the actual product. window.adminAccountId=254075701; Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.