ITEM NAME:Oil Pump Oiler Worm Gear Spring Kit 1122 640 7105 fit for Stihl 066 MS650 MS660 Oil Pump Oiler Kit with Worm Gear Spring 1122 640 7105 Fit for Stihl 066 MS650 MS660 SPECIFICATIONS.(Compatible With: fit for Stihl 066 MS650 MS660. 1 x Worm Gear with Spring. 1 x Oil Pump. 2) Perfect match for the original one. Manufacture Part Number: 1122 640 3205. Other Part Number: 1122 640 7105, 1122 647 2401.