If you're interested in broad exposure to the Mid Cap Blend segment of the US equity market, look no further than the iShares Core S&P MidCap ETF (IJH), a passively managed exchange traded fund launched on 05/22/2000.The fund is sponsored by Blackrock. It has amassed assets over $68.20 billion, making it the largest ETFs attempting to match the Mid Cap Blend segment of the US equity market.Why Mid Cap BlendMid cap companies, with market capitalization in the range of $2 billion and $10 billion, offer investors many things that small and large companies don't, including less risk and higher growth opportunities. These types of companies, then, have a good balance of stability and growth potential.Blend ETFs usually hold a mix of growth and value stocks as well as stocks that exhibit both value and growth characteristics.CostsExpense ratios are an important factor in the return of an ETF and in the long term, cheaper funds can significantly outperform their more expensive counterparts, other things remaining the same.Annual operating expenses for this ETF are 0.05%, making it one of the cheaper products in the space.It has a 12-month trailing dividend yield of 1.06%.Sector Exposure and Top HoldingsEven though ETFs offer diversified exposure that minimizes single stock risk, investors should also look at the actual holdings inside the fund. Luckily, most ETFs are very transparent products that disclose their holdings on a daily basis.This ETF has heaviest allocation to the Industrials sector--about 18.20% of the portfolio. Financials and Consumer Discretionary round out the top three.Looking at individual holdings, Bio Techne Corp (TECH) accounts for about 0.74% of total assets, followed by Cognex Corp (CGNX) and Molina Healthcare Inc (MOH).The top 10 holdings account for about 6.09% of total assets under management.Performance and RiskIJH seeks to match the performance of the S&P MidCap 400 Index before fees and expenses. The S&P MidCap 400 Index measures the performance of the mid-capitalization sector of the U.S. equity market.The ETF has added roughly 27.98% so far this year and was up about 46.90% in the last one year (as of 11/05/2021). In the past 52-week period, it has traded between $202.21 and $288.18.The ETF has a beta of 1.17 and standard deviation of 27.41% for the trailing three-year period, making it a medium risk choice in the space. With about 404 holdings, it effectively diversifies company-specific risk.AlternativesIShares Core S&P MidCap ETF carries a Zacks ETF Rank of 3 (Hold), which is based on expected asset class return, expense ratio, and momentum, among other factors. Thus, IJH is a reasonable option for those seeking exposure to the Style Box - Mid Cap Blend area of the market. Investors might also want to consider some other ETF options in the space.The iShares Russell MidCap ETF (IWR) and the Vanguard MidCap ETF (VO) track a similar index. While iShares Russell MidCap ETF has $31.37 billion in assets, Vanguard MidCap ETF has $55.37 billion. IWR has an expense ratio of 0.19% and VO charges 0.04%.Bottom-LineWhile an excellent vehicle for long term investors, passively managed ETFs are a popular choice among institutional and retail investors due to their low costs, transparency, flexibility, and tax efficiency.To learn more about this product and other ETFs, screen for products that match your investment objectives and read articles on latest developments in the ETF investing universe, please visit Zacks ETF Center. Want key ETF info delivered straight to your inbox? Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week.Get it free >>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 iShares Core S&P MidCap ETF (IJH): ETF Research Reports Molina Healthcare, Inc (MOH): Free Stock Analysis Report Cognex Corporation (CGNX): Free Stock Analysis Report BioTechne Corp (TECH): Free Stock Analysis Report Vanguard MidCap ETF (VO): ETF Research Reports iShares Russell MidCap ETF (IWR): ETF Research Reports To read this article on Zacks.com click here.