Derma Blue+ Sterile 4" x 4" Square Silver Foam Dressing, 76040414 - Box of 10. Brand: DermaBlue+ foam. Manufacturer Name: DermaRite Industries. Manufacturer number: 76040414. Application: Foam dressing with silver. Color blue. Dimensions: 4 x 4 inches. Ingredient impregnated: 7 mg silver ions / 0.25 mg methylene blue / 0.25 mg gentian violet. Material: polyurethane foam. Shape: Square. Sterility: Sterile. Type: Non-adhesive. SOLD BY: Box of 10.