Alaska Rubbers Pvt. Ltd. Manufactures Polyethylene Maximum Duty Elevator Bucket. Alaska Rubbers Pvt. Ltd. Is an ISO 9001 certified company. The Polyethylene Maximum Duty Elevator Bucket designed and engineered to increase bucket life and reduce breakage. The Polyethylene Maximum Duty Elevator Bucket is used to keep grain, fertilizers, pellets, corn, wheat, soybeans and other agricultural and light industrial applications.