The grades of 5 Health Care Equipment & Supplies stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This is a strong week for Stryker Corporation (SYK). The company’s rating climbs to A from the previous week’s B. Stryker Corporation produces a variety of products in the medical technology sector. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of SYK stock.

Oxford Immunotec Global PLC (OXFD) gets a higher grade this week, advancing from a C last week to a B. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of OXFD stock.

CRH Medical Corporation (CRHM) improves from a B to a A rating this week. The company also gets A’s in sales growth, operating margin growth, earnings growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CRHM stock.

Check-Cap Ltd. (CHEK) is seeing ratings go up from a C last week to a B this week. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CHEK stock.

BIOLASE, Inc.’s (BIOL) ratings are looking better this week, moving up to a A from last week’s B. BIOLASE, Inc. develops, manufactures, and markets lasers systems for dental and medical applications and procedures in the United States and internationally. For more information, get Portfolio Grader’s complete analysis of BIOL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.