3/4" Grommet, pack of 10
3/4" Grommet, pack of 10 at HorticultureSource.com -
General Hydroponics 3/4" Grommet (GH4174) 3/4" Grommet Insert that goes into the 1" grommet as an adapter for barbed fittings (10 per pack)   Manufacturer's Product Information MSRP each $ 0.7 UPC 793094042000 Dimensions 1.1 x 0.1 x 14.6 Case Quantity 10