Top Hat Grommet 1/2" (13mm)  Bag of 25
Top Hat Grommet 1/2" (13mm) Bag of 25 at HorticultureSource.com -
TopHat Grommet 1/2" (13mm) (AN45735) 1/2" TopHat Rubber Grommet will provide a watertight seal in DIY systems. For use with 1/2" connectors.  Tappered on exterior and interior sides for easy acccess. Manufacturer's Product Information MSRP each $ 0.32 Dimensions 0.5 x 0.25 x 0.5 Case Weight 5 Case Quantity 25