String Tying We have the ability to string tie fibrous casings with a lay-flat size from 4/5" to 8" and ranging in lengths from 10" to 75". In addition, there are other types of string tying available. We can crimp tie, safety tie or do a registration cut and tie. Also, vent holes can be done upon request. The pattern of the vent holes can be 1 hole to 6 holes. String Tying Loops We offer either cotton or nylon loops, with a stay open style, with no twisting after soaking or stuffing for easy loading onto cooking racks. We have a 3 34" loop, which makes it easier to load and handle the product. The standard color of the 3 3/4" loop is a natural blend. Special colors can be ordered upon request.