All chipper blades must be picked up within 30 days of their drop off date. No returns on electrical parts. No returns without receipt. No returns after 30 days. A 20% restock fee will be added to any return parts. Non-Stock Special Order parts are non-returnable. All parts and labor are warranted for 30 days from invoice date. Any disputes with charges must be made within 15 days of invoice date. All controversies after these dates will be denied. Estimates are an approximation of charges to you, not a contract or a bill and they are based on the anticipated details of the work to be done. It is possible for unexpected complications to cause some deviation from the estimate. Requirements may increase or decrease the total amount invoiced. If additional parts or labor are required, you will be contacted immediately. 18% Interest per Annum charged to any past due balance (1.5% per month)