This procurement is for a one-year Indefinite Delivery Contract for back-up rings, with an aggregate order ceiling of $350,000. The guaranteed minimum is one unit, with an estimated three orders per year. Delivery of items is required within 71 days after receipt of order, with shipments going to various DLA depots within and outside the continental United States. Quotes must be submitted electronically, and the solicitation is only available online. All responsible sources are eligible to submit a quote for consideration.