BOULDER - JustRight Surgical LLC expects to raise $10 million from existing investors after receiving U.S. Food and Drug Administration clearance to sell a small stapler used in children's surgery.

The Boulder-based company's 5-millimeter stapler was developed for pediatric surgeons operating in limited space, said Russ Lindemann, JustRight's chief executive. It is nine times smaller than existing staplers on the market, according to the company.

JustRight expects to receive clearance to sell the device in international markets by the end of 2014, Lindemann said.

The company plans to add as many as 20 salespeople during the next year at its offices in Boulder and Boston.

JustRight received FDA clearance in May to market a vessel-sealing device used in surgery that was developed by its employees.

"We're very excited to have two products cleared through the FDA in the last nine months," Lindemann said.

Steve Rothenberg, medical adviser and co-founder of JustRight Surgical, said miniaturization in the electronics industry happens almost faster than it can be absorbed, but the downsizing of surgical instrumentation has remained stagnant. "We have made it our mission to change that," he said in a press statement.

JustRight started in 2010. Its six founders come from medical companies in the Boulder-Denver area, including Covidien Plc's operations in Boulder, Lindemann said.

Local investors have funded the company with $15 million in the last two years, according to the press release.