The most common RG designations seen these days are RG-6, RG-8, RG-11, RG-58 and RG-59. RG-58 and RG-8 are 50 ohm coaxes, used in radio transmission (e.g., CB or Amateur radio) or in computer networks, RG-8 being a rather large cable and RG-58 a smaller cable. As 50 ohm cables, these are unsuited for video work. RG-6, RG-59 and RG-11 are all 75 ohm cable types, with RG-59 being the smallest, RG-6 in between, and RG-11 being the largest. RG-11 is practically absent from home a/v applications, because it is very large, not very flexible, and completely incompatible with RCA connectors; its main uses are in very long runs where low signal loss is of paramount importance. RG-6 and RG-59 are both common in home a/v use, because their sizes are compatible with a variety of connectors. Both are available in many different types, with different shields, jackets, dielectrics, and center conductor materials. The best of these, from an overall performance standpoint, are the modern \"precision video cables\" such as Belden 1505A (RG-59 type) and 1694A (RG-6 type).