Water-Sensitive Spray Test Cards — 2" x 3", Pack of 50

Pack of 50 water-sensitive test cards, each measuring 2" x 3". These cards reveal spray nozzle performance by turning blue at points where water droplets strike, clearly indicating spray density and penetration. Use them to check coverage and droplet patterns in greenhouses, orchards, across field rows, or in treetops, and to evaluate spray droplet patterns on new or modified equipment.