For Sale: Mature Metal Pet Trap For sale / exchange: Mature metal Pet Trap, tube only. 3" length, 1-3/8" inner diameter. Feel free to make an offer. I've modified the base ring myself for a custom fit, so it's not for sale (you can however, purchase a new one). I am interested in getting a 3-1/2" length, 1-1/8" inner diameter tube, I need to go slightly longer and smaller diamter. I would actually fit in a 4" tube, but I worry if I upgrade to a PA piercing attachment, I would suffer pulling when in extreme cold. In any case, if you have a device with measurements close and are interested in a trade, I'd consider it. I'm only interested in a steel device made by Mature Metal.