Here is the link to the manual:<br/>https://d2v0huudrf11kh.cloudfront.net/vevor-center-goods/45%C2%B0%E6%89%A9%E5%AD%94%E8%AF%B4%E6%98%8E%E4%B9%A6_1652712955568.pdf
The instructions can be found in the files in the reference link: https://d2v0huudrf11kh.cloudfront.net/vevor-center-goods/45%C2%B0%E6%89%A9%E5%AD%94%E8%AF%B4%E6%98%8E%E4%B9%A6_1652712955568.pdf
Depends upon the "alloy" of the stainless, the "type" of the tube ("welded" or "seamless"). For example, I've just done a <font color='#9661BC' title='测试词库'>test</font> that suggests that seamless 304 3/8ths works fine...