A: half inch ID.
A: Neither. The inside diameter is not 1.5 meters nor 1.2 meters.
A: The couplings of the washer hose is brass.
A: Steel with a brass-colored finish.
A: The VAST majority of washers use the exact same connections. These should fit. Unless you bought something that is intentionally bizarre then you should be fine. Besides, it's home depot so you can return these if they don't fit without issue.
A: These hoses have a standard size fitting for screwing onto the supply bib and machine... same as your standard garden hose size.
A: They are standard for most washers.
A: These are standard hoses and should fit any residential clothes washer. Thank you for viewing this Whirlpool Corporation accessory.