<b>Compatibility:</b><br> Fits Stihl MS390 MS290 MS310 029 039 chainsaw<br> Replaces OEM #: 1127 020 1216<br> <br> <b>Cylinder size:</b> 49mm<br> <br> <b>Package list:</b><br> 1x cylinder piston(49mm)(OEM# 1127 020 1216)<br> 1x crankshaft<br> 1x engine pan / bottom cover<br> 4x cylinder mounting screws<br> 1x piston pin needle cage bearing<br> 2x crank main bearings both sides<br> 2x oil seals<br> 1x spark plug<br> 1x decompression valve<br> <br> <b>Note:</b> The cylinder has a decompression hole, if your original cylinder does not, please don't buy<br>