This Uline S-5003 Press On Vinyl Envelope is a reliable and practical option for your business needs. The envelope is 4″ x 4″ and comes in a pack of 50. The brand Uline is known for its quality products and this envelope is no exception. It is perfect for packaging and shipping items and is great for use in a variety of industries. The envelope is made of durable vinyl and has a press-on closure for easy opening and closing. It is ideal for use with a wide range of materials and is a must-have for anyone who wants to keep their items safe and secure during transportation.