Camphor Rim Hanger - Deodorizer - Lasts up to 30 Day - 12 / Box - Pink Pearl Sold as 12/BX. Camphor rim hangers are air soluble replacements for para products and are VOC-compliant in all 50 states. Triple action cleaner and deodorizer with enzymes work to keep toilets clean and further neutralize odor. Toilet bowl ring hangers are safe to handle and designed to last 30 days.