1Fitment: This impeller housing is professionally designed and manufactured, perfect replacement for MD40B2 14. Gear Case (Drive Shaft) MD30/40/50B2 2014; Replacement for MD50B2 14. Gear Case (Drive Shaft) MD30/40/50B2 2014; Replacement for MFS40A 11. Gear Case (Drive Shaft) 2014; Replacement for MFS50A 11. Gear Case (Drive Shaft) 2014. 2Oem: The Oem of this impeller housing are 3T5650180M and 3C8?65016?1 for reference, please check the part number of your item before purchasing. 3Durable Construction: Our impeller housing is made from stable material for maximum durability and reliability, which has a long service life. 4Exquisite Workmanship: Rust proof and has great sealing, more flexible and wear resistant, reduces maintenance costs and easy to install. 5Direct Replacement: Completely conforms to Oem standard, and can directly replace the old or worn part for time and labor saving.