Air Filter Fits Stihl 4237-120-1800 HS81 HS81RC HS81TC HS82 HS86 HS86T HS87 by Stens $9.99 Sold out 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out PRODUCT DESCRIPTION Brand New Air Filter Fits Stihl 4237-120-1800 HS81 HS81RC HS81TC HS82 HS86 HS86T HS87... Genuine Stens Part # 605-819