Unique to Apex Instruments, the Stainless Steel Nozzle Shank has integrated Ferrule with O-Ring Groove. The most popular nozzles are constructed from seamless 316 stainless steel and can be coated with FEP or SilcoSteelCR®. Standard sampling nozzles are 4” long and have a 5/8” o.d. shank for attaching to the probe union. Other sizes and configurations are available. Nozzles must be measured/calibrated before initial use. Other nozzle materials include PTFE Lined, Alloy, Inconel, Borosilicate Glass and Quartz.