Guardhouse heavy-duty coin tube boxes for shipping and storing Guardhouse 1 oz silver rounds tubes and/or American Silver Eagle tubes are designed to perfectly accommodate 500 oz of silver. Made in the USA, Guardhouse heavy-duty coin tube boxes feature re-enforced tape filaments and internal dividers constructed of inert foam. Guardhouse coin tube boxes have a high quality exterior, are manufactured with thumb-cut notches and are ideal for shipping or storage.