OPOLE -- Workers at Polar tank Trailer in Opole have voted to continue to strike.

The members of International Association of Machinists and Aerospace Workers Local 623 voted Monday night to continue the strike now in its 13th day.

Union spokeswoman Colleen Murphy Cooley says the company had made some revisions to its offer, but not enough to satisfy the rank and file to ratify the deal.

The workers are upset over the outsourcing of jobs, seniority language changes and rising health care costs.

Murphy Cooley has placed a call to the mediator about scheduling further talks, but has not heard back.

Polar Tank Trailer employs about 350 people and is the largest tank manufacturer in the country.