Stop Rust Before It Starts
Each “Blox” protects up to 300 cubic inches of air-tight space with time-released, corrosion-inhibiting vapors for at least one year. Spread several through tool chest, tackle box, gun cabinet.
Big Book Catalog, Issue:69, Page:356
SPECS: ¾" (19.0mm) squares. Packed in 12, 50 or