Never seen these before; closest match would be the T-shaped grommets from the top of the Armortecs. (But you'd have to order the full set).
These ones are super helpful to protect the frame of the racquet when stringing high tensions. There is a lot of stress applied to the shared grommets.
Mark A is correct in that you have to order those as part of a full set of Armortec grommet replacements. I know MBS sells them as a set and same with shuttlehouse. Haven't found any online retailer that just sells them alone. The other option is look for broken armortecs and pop the grommets out if they are still in good shape.
Hey @Trinhity : Are they these: http://www.ebay.com/itm/Badminton-Tennis-Squash-Racquet-Grommets-/271217586800 And here: http://www.newtechtennis.com/store/index.php?main_page=product_info&products_id=134 They look promising.
Those are squash grommets, if the picture is correct at 3.1mm ... although the extra long one is listed at 2.8 which *might* fit some frames, although most that i come across want 2.6 so you might struggle.
Correct - those grommets are not designed for badminton. I actually ordered some and found out they don't fit badminton racquets. Had to ship them back for a full refund. Customer service was excellent by the way!
