<https://4-petproducts.com/product/petsafe-spray-refill-cartidges-unscented-3pk/#product>
<http://schema.org/description>
"Features:Compatible with PetSafe Spray Bark Collar and the PetSafe Remote Spray TrainerIt is not compatible with the PetSafe GentleSpray, Elite Big Dog and Little Dog Spray Bark Collars or Elite Big Dog and Little Dog Spray Trainers that use a refill canThe refill cartridges are easy to replace; simply remove the empty cartridge and replace with the new refill cartridgeThree cartridges are included for the PetSafe Spray Bark Collar or Spray Trainer. Available in Citronella or UnscentedThe PetSafe refill cartridges are exclusive to PetSafe spray products and other refill cartridges will not work.The PetSafe Spray Refill Cartridges are easy to replace with no mess. Simply remove the empty refill cartridge and replace with the new one."
<https://4-petproducts.com/product/petsafe-spray-refill-cartidges-unscented-3pk/>