Electrolytic silver recovery device designed for the smaller darkroom recovers 30 to 50 troy ounces of silver per year if you use just one gallon of fixer solution per week. Simply submerge the pick-up cell in a container of used fixer solution, plug into an AC outlet, and it starts extracting silver. When the Silver Magnet becomes filled with silver (up to 30 troy ounces), insert the pick-up cell into the included preaddressed shipping bag and mail to the recycler. Payment will be mailed to you promptly. 221063 Silver Magnet includes power supply, pick-up cell, instructions, shipping bag and mailer envelope. 221065 Silver test strips are used to determine approximate silver concentration in fixer.