DESCRIPTIONProbe compression fitting used to integrate into PVC plumbed filtration systems and sumps to create a watertight seal around an aquarium probe.GENERAL Rubber compression around probe creates watertight seal. MISCELLANEOUS Probe diameter range: 9 - 14 mm ½ in male threaded connection APPEARANCE Black plastic and rubber COMPONENTS Compression cap Compression gasket (rubber and plastic) Threaded nut Gasket Main body