Picture shows european plug. is this with a us plug for 110 voltage?

I noticed the same thing when I ordered mine. Mine did come with a standard US two prong plug for 110v.

What country is it manufactured?

Either Germany or Czech Republic

Does this work with a standard US shop vac (1.25”)?

I use this https://www.amazon.com/Cen-Tec-Systems-94192-Universal-Collection/dp/B07NZZZ5ZL/ref=sr_1_1_sspa?crid=1Y80Y2HSTS9ZD&dchild=1&keywords=centec+vacuum+hose&qid=1601828858&sprefix=centec%2Caps%2C240&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzNUtJWjRLUVRDTFE0JmVuY3J5cHRlZElkPUEwNDE2OTM4OUM0SjczTElTTVFaJmVuY3J5cHRlZEFkSWQ9QTAwNjE2MDZKUUc5UDBNRU9GUU8md2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl Its a great hose for excellent price. I use it with my 6hp shopvac that I plumbed with 2" sch 40 and made any adaptors I needed from 2" plumbing fittings and a heat gun if needed the centec hose end fits almost perfectly in 2" fitting I went around the vac hose once with the fuzzy side of velcro and it fits great. I could have heated the pvc and shrunk it to fit but the velcro was easy and I had some laying around. Mine is a more dedicated use If I was going to be pulling the vacuum around by the hose I would shrink fit the pvc for more secure fitting.