He was a drum maker of medium height and build with grey eyes and hair in 1918.
"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K6JJ-5D6 : 13 March 2018), Charles August Rader, 1917-1918; citing Niagara Falls City, New York, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,818,599.
He is possibly the Carl Rader baptized 20 Nov 1874 in the Evangelische Kirche in Solingen, Rheinland (Rhein Pfalz), Prussia. Son of Louis Rader and Ida Kohl. It seems a little late for baptism, which traditionally is the first stop outside the home after birth. Update: This isn't your relative; this Carl was born in August per another record.