BrandNewCake Silicone Cover Nozzle Set/6 The BrandNewCake Silicone Cover Nozzle Set/6 is made of silicone. The caps are super handy for temporarily covering a nozzle to prevent drying out. The pack contains 6 cover caps in two different sizes. There are 2 large and 4 small caps in this set. As the caps are flexible, they can be used on multiple nozzle sizes.