10 each per box. The #4501 is built to withstand the harshest of conditions, designed for the toughest jobs, will easily light any flammable gas. It is manufactured of heavy, high tensile strength steels, plated and galvanized. Guaranteed to spark vigorously and reliably. The #4501's triangular flint holder may be easily rotated for a fresh flint, and when all three flints are finally gone, the flint assembly is easily replaced with a Shurlite three flint renewal.