JT Eaton 530-GN Insecticidal Duster with Green Powder Coat Finish (Pack of 18) Precisely apply insecticide dust into cracks and crevices, wall voids and hard-to-reach areas Fill duster half full with 1.2-ounces of diatomaceous earth or 5-ounces of boric acid "O" ring at the adjustment screw eliminates or reduces leakage Comes in an 18-pack and is color coded green for insecticidal identification Comes with a 1-year limited warranty