We will always combine shipping. If items are on sale, we will need to refund you within 24 hours. Shipping policy for domestic small items: The highest shipping plus 75 cents per lot. Larger domestic shipping items are the highest shipping plus $1.00 shipping. Large albums and heavier items vary. The product is a pair of Iceland stamps with the catalog numbers 271 and 272 in very fine, mint never hinged condition. These stamps are of Icelandic origin and manufacture, making them unique and collectible items for stamp enthusiasts. The certification is not mentioned, but the high quality and grade of the stamps make them a desirable addition to any collection focusing on Icelandic philately.