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In my
search for a tube for the VSC/ SAO 127mm f/9.4 "BGRP" refractor, I
wanted to deal with a company that had and still has a great
reputation for delivering quality consistently, for which I
purchased a 5" OD x 48" L x .073" wall thickness of T-6061 aluminum
tubing. That company was Hastings Irrigation Pipe Company®. Some may
fine their prices a bit high, but they especially cater to the
amateur telescope maker. There are other companies like Speedy
Metals®, and Online Metals® that are also great resources. Tubes
from these suppliers arrive in excellent condition with no dents or
dings.
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