Investors looking for stocks in the Communication - Components sector might want to consider either Corning (GLW) or Airgain (AIRG). But which of these two stocks is more attractive to value investors? We'll need to take a closer look to find out.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The proven Zacks Rank emphasizes companies with positive estimate revision trends, and our Style Scores highlight stocks with specific traits.Corning has a Zacks Rank of #2 (Buy), while Airgain has a Zacks Rank of #3 (Hold) right now. Investors should feel comfortable knowing that GLW likely has seen a stronger improvement to its earnings outlook than AIRG has recently. But this is just one piece of the puzzle for value investors.Value investors analyze a variety of traditional, tried-and-true metrics to help find companies that they believe are undervalued at their current share price levels.The Value category of the Style Scores system identifies undervalued companies by looking at a number of key metrics. These include the long-favored P/E ratio, P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that help us determine a company's fair value.GLW currently has a forward P/E ratio of 22.68, while AIRG has a forward P/E of 69.77. We also note that GLW has a PEG ratio of 1.63. This figure is similar to the commonly-used P/E ratio, with the PEG ratio also factoring in a company's expected earnings growth rate. AIRG currently has a PEG ratio of 1.99.Another notable valuation metric for GLW is its P/B ratio of 2.98. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. By comparison, AIRG has a P/B of 4.43.These are just a few of the metrics contributing to GLW's Value grade of B and AIRG's Value grade of D.GLW sticks out from AIRG in both our Zacks Rank and Style Scores models, so value investors will likely feel that GLW is the better option right now.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Corning Incorporated (GLW): Free Stock Analysis Report Airgain, Inc. (AIRG): Free Stock Analysis Report To read this article on Zacks.com click here.