Please don't damage the shells and return them in clean condition, within 7 days of receiving them. (Scratches and use from walking the horse in them is fine.) Understand that we only have a limited amount of fit kits, and other people need them as well. If you need more time please contact us, to see if you can keep your shells longer. If they return late (without notice) or dirty, we will charge you a $5 fee per fit kit. If a shell is returned damaged, we will not refund your deposit of that shell. Note: you will be responsible for returning the fit kit to us, at your cost, and we are not able to refund you, until the fit kit is received by us. We recommend a recorded method of postage. (USPS flat rate) If we wont get the fit kit back at all, we will send you an invoice of $25 per shell, within 2 weeks of our shipping date. Be aware that even we keep them clean, and desinfected, this shells go from one horse to another. We will not take any responsibility for contamination or harm caused by this fit kits. All the described above, also applies to test bulb shields.