Variety of O-ring and bonded seal kits are offered—these are a necessity for both maintenance and repairs. Most fluid piping system sizes are measured by dash numbers. For example, a –04 port is 4/16 or 1/4-in. Dash numbers are usually nominal and are abbreviations that make ordering of components easier. Each kit is packaged in an 11” x 1-3/4” x 6-3/4” high strength oil resistant polypropylene box. The inside cover is labeled with individual part numbers, quantities, and descriptions.