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Oil Sensitive Spray Cards indicate spray nozzle density and penetration
These Oil Sensitive Spray Cards turn blue where water droplets hit them, showing spray density and penetration. Perfect for use in greenhouses, orchards, across field rows, in treetops or to assess spray droplet patterns on new or modified equipment. 50 -2" x 3" cards per pack. USA made.
2016 Master Catalog: Page 326