Non genuine air filter suitable for Stihl HS81, HS82, HS86 and HS87 hedge trimmers. Replaces part number 4237 120 1800. Set of three air filters. Please, check your old part with the pictures prior to purchase. SKU 580644 All items will be shipped within 1 working day. We can combine shipping, just ask before you buy. We offer a 30-day money back guarantee - if you want to return the item for any reason, it can be returned within 30 days from receiving the goods. Any return postage cost is paid by buyer, except when the item is defective or different part than ordered is received. A date of purchase and user ID must be included with the returned part. Please, contact us in case of any problems or issues, we will try to respond to all messages within 24 hours.