Hoop Tech Slim Line-1 Right Side Cap Window Frame Sets Cardboard Sided and attach to the chassis

and attach to the chassis that then attaches to your machine

yellow upper window and silver upper window for light fabrics

and sports equipment

heavy denim

Hoop Tech Slim Line-1 Right Side Cap Window Frame Sets Cardboard Sided and attach to the chassisSelecting the right window frame for your Slim Line Clamping System is important for your embroidering. Some windows have specific uses and there are 9 sizes to choose from for the Slim Line 1. With each size of window frames, you receive 3 pieces the base adapter that fits into the base of the clamp chassis, the flat aluminum heavy duty top window for thicker and less flexible material, and the stainless steel thin material window for thinner