ITEM NAME:Worm Gear Oil Pump Accessory Kit for STIHL 017 MS250 Chainsaw 11236407102 Description: Fit For: STIHL 017 018 MS170 MS180 170 180 021 023 025 MS210 MS230 MS250 Chainsaw Replace 1123 640 2074 , 1123 160 2050 , 1123 640 3200 , 11236407102 , 11236472400 Clutch drum feature: 3/8" pitch, 7 tooth Package Includes: 1x 325in-7T Clutch 1x Clutch Drum 1x Washer 1x Worm Gear 1x Oil Pump 1x Clutch Needle Bearing Note: The color may be different for different display, pls understand Pls allow 1-3mm error due to hand tste, thank you SKU: DMO0006682960027127.Replace 1123 640 2074, 1123 160 2050, 1123 640 3200, 11236407102, 11236472400. Fit For: STIHL 017 018 MS170 MS180 170 180 021 023 025 MS210 MS230 MS250 Chainsaw. 1x Worm Gear. Clutch drum feature: 3/8" pitch, 7 tooth.