The selection of the nine players reflects their performances this season. Harlequins finished top of the Aviva Premiership last weekend and have a home semi-final play-off match with Northampton Saints on Saturday.
Seven of the nine players are products of the club's Academy which was recently assessed by the RFU and Premiership Rugby as being one of the best in the country.
Commenting on the players' selection, Harlequins Director of Rugby Conor O'Shea said, "I'm pleased on two levels. First of all for the club as the selection of so many players reflects our ambition and is fantastic recognition of the efforts of our squad this season. Second, from the players' perspective, their selection is reward for the hard work they've put in.
"Given the fact that seven of the nine players are products of the club's Academy, I am sure they would all want to recognise the work that Collin Osborne put in with them initially in setting up the Academy and this has been continued by Tony Diprose, Howard Graham and Jim Evans," O'Shea added.
