Contains a 7 pack of reed materials. All 7 reed panels are sized 2 1/2 inches by 5 inches. Materials are: Polyester film .010 thick, Polyester film .015 thick, Polyvinly (clear) .015 thick, Fiberglass phenolic .010 thick, Fiberglass phenolic .015 thick, Phenolic linen .015, Phenolic linen .010. Use scissors to cut reed to size. You can use reeds from calls you own as patterns or make your own. The tip shape can be changed, thickness modified or width increased/decreased to change tones and pitches. Each reed material produces slightly different tones that have proved affective in calling predators. Enough material to build well over 100 reeds (depending on size).