Proto Labs (PRLB -0.35%) continues to be one of the best companies in the 3D printing and rapid prototyping business, but that doesn't mean it's a straight line higher for investors. The company's first-quarter results did show some weaknesses, and Travis Hoium highlights what investors should consider in the video below.

*Stock prices used were end-of-day prices of May 8, 2023. The video was published on May 9, 2023.