Spray cards indicates spray nozzle effectiveness

• Spray cards show spray density and penetration

These water-sensitive yellow 2" x 3" cards turn blue where water droplets hit them, showing spray density and penetration. 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. Oil-sensitive cards are gray and are for use wth oil-based sprays. USA made.