8" internal purse flex frame. Picture shows this frame hinged and open and also unhinged laying flat. This frame comes to you hinged. Use a pair of pliers to pinch the end to releave the pressure to remove the pin. To insert this frame into your casing; unhinge both ends, slide one frame piece through assigned casing, repeat for other frame piece, then rehinge (pinch ends with pliers to line up holes to insert pin). The frame can be removed for laundering.