The Luster Leaf 1601 Rapitest Test Kit is a soil test kit designed to measure soil pH levels, as well as nitrogen, phosphorus, and potash content. Manufactured by Luster Leaf Products Inc, this green-colored kit includes all the necessary tools and instructions to accurately test the soil in your yard or garden. With a compact design and a weight of only 0.25 pounds, this product is easy to use and transport, making it a convenient tool for any home gardener looking to ensure their soil is optimal for healthy plant growth.