Foam Dressing with Silver DermaBlue+ Foam 4 X 4 Inch Square Sterile. Brand: DermaBlue+ Foam. Manufacturer Name: DermaRite Industries. Manufacturer Number: 72040414. Application: Foam Dressing with Silver. Color: Blue. Dimensions: 4 X 4 Inch. Impregnated Ingredient: 7 mg Silver Ion / 0.25 mg Methylene Blue / 0.25 mg Gentian Violet. Material: Polyurethane Foam. Shape: Square. Sterility: Sterile. Type: Non-Adhesive. SOLD BY: Box of 20.