Proof of purchase (order number) and kistlerrods.com account required to process a warranty claim. No Order Number: *We are sorry to inform you that your product was manufactured before 2020 which would place your product out of our warranty period. *If this product was a gift, you will need to acquire the original purchasers email and order number. *If this product was purchased from someone as second hand, the warranty is only valid to the original purchaser. See the WARRANTY tab on the website with the price breakdown of our LIMITED Lifetime Warranty proration should your product be older than 12 months old. If help is needed please give us a call at 281-259-8033 or email us at orders@kistlerrods.com