Excuse my knowledge for restaurant equipment. I only know what Google tells me about these items. They appear to be in good shape other than the plastic locking mechanisms. To me. They look very worn and possibly do not lock into the machine. I do not have the powerhead to these so there is no way for me to check. One of them appeared to be about 21 in and the other one appears to be about 19 in. Please see all photos for the most accurate description of condition as these are sold as is.