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As packaged, this test kit refill replenishes consumables in the Ecosystems and Their Interactions 1-Class Water Quality Test Kit (item #513605) so it can be reused with 4 classes. To replenish the water quality test kit supplies in the STCMS™ Ecosystems and Their Interactions 5-Class Unit Kit (item #513601U5) or 5-Class Refurbishment Set (item #513604U5), buy one Ecosystems and Their Interactions 1-Class Water Quality Test Kit Refill (item #513606) plus this Ecosystems and Their Interactions 4-Class Water Quality Test Kit Refill. Note: Refill does not include instructions for use.
If for any reason you are not satisfied with this item, it is eligible for a return, exchange, refund, or credit up to 180 days from date of purchase. Restrictions may apply. Returns & Exchanges Policy.
