This listing is for one Pyrex Insulator. This insulator will make a fine addition to your collection. It has a wonderful very clear glass. These insulators were originally manufactured by Pyrex (1924-1941) for telephone circuits and used the less common small pin for mounting. Eventually, this style Insulator, CD128, was manufactured by a number of companies. These insulators have no major blemishes. The are ~2.6" wide x 4" tall. They have been cleaned in a specially formulated acid bath and thoroughly washed for maximum shine. Please note that many of our items are vintage and many are used. The sands of time have an effect on materials due to years of weather, handling, storage technique, and/or natural degradation of the material itself. The photos are typical of the product shown. Actual grain patterns in wood, finish colors, small insulator blemishes etc., vary slightly with each piece we acquire or make. We make every effort to ensure that the pictures shown represent what you will receive. We try and accurately describe the items we sell . Due to differences in lighting or display devices, there may be differences of opinion as to the attributes of a particular item. If you are dissatisfied and believe our assessment of an item is incorrect, please contact us. We will do all we can to make it right. We want to earn the privilege of having you as our customer.