1 1/2″ Double offset Flush Tube
Here’s the match to your original Gaylan high tank toilet flush tube. 6′ long, can be cut down to a minimum of 50″. 1 1/2″ diameter, .065 wall thickness. Pictured tube is chrome
As this particular item requires an oversize box, the dimensional shipping weight will be at 30 pounds. Please see this webpage for more explanation.