Specification Brand : Bay Hydro BulletPoint : Size: ID 3/4" 19mm, use with 1/2" ID PVC, Vinyl, or Drip line tubing BulletPoint1 : This order is for Black Epoxy | 1 Piece | Larger Opening BulletPoint2 : READ ALL DIMENSIONS! - 2" total diameter, 1.53" (40mm) hole diameter, sizes are approximate due to finishes BulletPoint3 : Easy installation: Press Fit or Glue BulletPoint4 : Grommet opening: 0.82" inches (21 millimeters) BulletPoint5 : ✅WIDE APPLICATION - Rubber grommets help protect wires and cables from sharp metal corners or edges and eliminate wire risks and protect cables from dust and rain. Suitable for electrical cabinet, box outlet protection seal and so on. Color : Black Epoxy CpsiaCautionaryStatement : no_warning_applicable ExternallyAssignedProductIdentifier : 7430988763735 ExternallyAssignedProductIdentifier1 : 0039517305605 ExternallyAssignedProductIdentifier2 : 039517305605 IncludedComponents : Unit^Instruction Guide ItemName : Bay Hydro 3/4" ID Donut Style Grommet DSG 25pc ItemPackageDimensions_Height : 21 inches ItemPackageDimensions_Length : 18 inches ItemPackageDimensions_Width : 18 inches ItemPackageQuantity : 25 ItemShape : Round ItemTypeKeyword : continuous-grommets Manufacturer : BAY HYDRO LLC Material : Rubber ModelNumber : 3/4" DSG NumberOfBoxes : 1 NumberOfItems : 200 PartNumber : 3/4"DSG ProductDescription : Bay Hydro Grommet are used in many Hydroponics Drip Systems or as replacements for many custom hydro setups. Bay Hydro rubber grommets / seals provide an air/water tight seal. ProductSiteLaunchDate : 2015-06-28T12:10:42.364Z Size : 0.87 (1/2" Trade) Style : Silicone Flange Grommet + Tank Lid Gasket SupplierDeclaredDgHzRegulation : unknown UnitCount : 1