Body of pipet is approximately 7 to 7.5 mm outside diameter with small constriction approximately 30 mm from the upper end to retain a cotton plug. Tip length of all 5 3/4" pipets is approximately 50 mm. Tip length of all 9" pipets is appoximately 120 mm. Easel-Pak pipets are packaged in easel-type dispenser boxes of 250 (case contains four boxes). Controlled Drop pipets deliver at a rate of 22-26 drops per mL. Intended for use with blood typing and cross-matching procedures in blood bank laboratories. Easel-Pak and Blood Bank pipets are available plain or with cotton plug.