Convenient mail-back sharps disposal system. Simply fill containers with used needles, carpules, and syringes. When ready for recovery, mail the container back by using the preaddressed, postage-paid return box. The cost of the container, return shipment, and recovery services are included in the purchase price. No long-term contracts or commitments are required. OnTraQ Enhanced is an online program used for tracking waste recovery, waste destruction, and archived documentation. The 8-gal. and 18-gal. sizes are for disposing full sharps containers only (no loose sharps should be placed in them).