(Reuters) -Putting Boeing (NYSE:) employees on the U.S. West Coast will vote on an improved contract provide on Monday, which features a 38% pay rise over 4 years and a much bigger signing bonus, their union stated on Thursday.

Greater than 30,000 manufacturing unit employees who produce Boeing’s strongest-selling 737 MAX business jet and different planes have been on strike since Sept. 13 and have rejected two earlier presents from Boeing.

Boeing’s newest provide features a $12,000 ratification bonus and the reinstatement of an annual bonus scheme that was not included in a earlier provide, The Worldwide Affiliation of Machinists and Aerospace Staff stated in an announcement.

IAM stated it was endorsing the provide forward of the vote.

Staff have been pushing for a 40% wage enhance and the return of a defined-benefit pension that they misplaced a decade in the past.

Final week, some 64% of the planemaker’s U.S. West Coast manufacturing unit employees rejected a suggestion of a 35% normal wage enhance over 4 years that was not endorsed by the union.

Boeing shares rose 2.5% in after-hours buying and selling after the provide was introduced following an unique report by Reuters. Shares had closed down 3.2% earlier on Thursday.