when to apply pre emergent

{"title":"Emergency Bandage Dress Elastic Trauma Israeli Bandage Breathable","imgUrl":"https:\/\/img.chinax.com\/nimg\/4a\/f4\/e036ecf86f9c29f2685c70f9dc84-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Henan Aile","Model Number":"Cusromized","Minimum Order Quantity":"5000 PCS","Delivery Time":"15-30 days","Certification":"ISO\/CE","Place of Origin":"China","Payment Terms":"L\/C, T\/T","Packaging Details":"100pcs\/pack,Paper Box, Exported Carton;Depend on your requirement","Material":"Cotton, Elastic Fiber, Nylon Plastic Button","Quality Certification":"CE ISO","Color":"Gray\uff0cSkin","Edge":"Folded Edge","Sample":"Free","Product Name":"Israeli Bandage","OEM":"Available","Shelf Life":"2 years"}}

{"title":"GE 3S-RS Phased Ultrasound Transducer Probe Imagic Digital 3.6MHz","imgUrl":"https:\/\/img.chinax.com\/nimg\/69\/cd\/d4a7265134b88a4c8f8f6ad8c6fe-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"GE","Model Number":"3S-RS","Minimum Order Quantity":"1","Delivery Time":"1-3 work days","Payment Terms":"T\/T, Western Union","Packaging Details":"Neutral Package","Category":"phased probe","Applications":"Probe the heart","Warranty":"60 days","Service":"Outright sale","Item":"3S-RS","Condition":"Original"}}

{"title":"OEM Conspicuity DOT Reflective Tape Reflector Sticker PET Type","imgUrl":"https:\/\/img.chinax.com\/nimg\/e9\/7d\/b3c13c0595064f797f1f6586e988-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"LU","Model Number":"LZT1100B","Minimum Order Quantity":"24 Roll","Delivery Time":"3-12 work days","Certification":"DOT-C2","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"100,000 rolls\/month","Packaging Details":"Standard export carton","Application":"Vehicle Marking or Trucks, Different Cars","Color":"White\/Yellow\/Red\/Red & White, etc","Lifespan":"1-10 Years","MOQ":"24 Rolls in 1 Carton","Material":"PET Type","Packaging":"Rolls","Product Name":"White Good Quality And Low Price Truck Reflector Tape Yellow Retro Reflective Sticker for Vehicles","Size":"0.05m*45.72m or Customized","Leading Time":"3-7 days after we confirm the payment","Adhesive":"Permanent pressure sensitive adhesive"}}