Piston Ring Set Compatible with Stihl MS661, MS661C Chainsaws Replaces OEM 11440302001, 1144-030-2001 Package Includes 1 Piston (Bore 56mm), 2 Piston rings, 1 Pin and 2 Clips. Cylinder is not included. Using high-quality aluminum alloy and steel materials, it is firm and durable, wear-resistant, and has a long service life. Good Quality & Price: GardenP+ manufactures the same or better quality than OEM standards. we satisfy our customers with satisfactory QUALITY and PRICE. We aim to help customers to get the job well done! 100% WARRANTY within one month, return, refund if you aren't completely satisfied in case of defection, damage, non-satisfaction etc. Please feel free to contact us if there is any question, since we are your reliable partner! GardenP+ Replacement Parts 11440302001 Piston Ring Kit Compatible with Stihl MS661, MS661C Chainsaws Replaces OEM Part Numbers:11440302001, 1144-030-2001 The Package Includes a Piston (Bore 56mm), 2 Piston Rings, 1 Pin, and 2 Clips; not including of cylinder. Using high-quality aluminum alloy and steel materials, it is firm and durable, wear-resistant, and has a long service life. Professional manufacturing, exquisite workmanship, and high accuracy help to provide the best performance. Every product from GardenP+ will enjoy 30 days of free return, and a money-back warranty if you aren't delighted in case of defection, damage, non-satisfaction, etc. Please feel free to contact us if you have any questions about the model and compatibility since we are your reliable partner ! Please note any brand name mentioned is only to demonstrate compatibility.