The product is a set of 250 #10 Golden Self Seal Kraft security envelopes from the brand Xxcxpark. These envelopes are sized at 4-1/8 x 9-1/2 inches and feature a golden color. They are designed for secure shipping and come with the manufacturer part number XC-8047B. Perfect for various businesses and industrial use, these envelopes provide a reliable and efficient way to handle and ship items. NIB Free shipping R3