[0] tube is measured by the outer diameter; pipe is measured by the inner diameter
[0] tube is measured by the outer diameter; pipe is measured by the inner diameter
Are you in the US? If you're trying to buy those tubes, are you trying to order very long lengths? UPS apparently has a limit of 108" total length, and a sum of 165" for length + "girth".
As for McMaster overall - I agree with some other sentiments here that they're great, though I do admit the "McMaster tax" (paying 10~200% what you could find the identical part somewhere else for) can be annoying at times, but is worth it when you want a reliable supplier with almost universally good quality products.
edit: Based on your reply to a sibling comment, I looked around, and found this thread that seems to reinforce your experience that McMaster shipping to Canada is...unreliable: https://www.chiefdelphi.com/t/mcmaster-carr-supplying-to-int...
I would try the recommendation there of ensuring you have a business name on the order, or, contact their support - I've had to contact them a couple times and they were generally quite helpful.
Good luck.
Hi xxxx,
We only ship to large businesses and schools in Canada. We can't accept your order. I'm sorry for the inconvenience. You might want to try Fastenal or Motion Canada.
Lauren
If that's a problem to them, I'm guessing they don't have a fully automated solution to that like e.g. DigiKey does.
I'm not sure if this is a super variable experience or if it has changed over time (I first ordered from them in 2020).
https://www.aircraftspruce.ca/
I've built a bike frame with their 4130 tubes.
"Due to the cost and complexity of shipping our products to Canada, we are only able to accept orders from businesses and schools. We’ve canceled your order. If this material is not for personal use, please resubmit your order online using the business or school name."
After that, I added my company's legal name to both shipping and billing address, put "Please note: this order is for business" in order comments the first couple times, and had no problems since.
I wish we had something similar in Canada that has a good selection and isn't a pain to deal with, but as it stands, McMaster is too good to give up on.
ETA: Having read your other comment, it appears they might have restricted their policy since then, but grandfathered existing clients. That would be really sad for Canadians.