The Ateco #850 Ten Piece Closed Star Tip Set contains #'s 0-9 Stainless Steel piping tips. These tips correspond to the single item numbers of 840, 841, 842, 843, 844, 845, 846, 847, 848 & 849. These tips can be used for everything from creating small borders, shells & rosettes to icing cupcakes in one swirl. These tips are designed for the cake decorator to be able to create beautiful cakes & pastries. A protective plastic case holds your tips in one place to keep them all together. The piping tubes can be used without a coupler but they also fit the Ateco medium coupler set. Piping tips may be washed in a dishwasher but are best cleaned by soaking them in hot soapy water and using a Tip Brush to thoroughly clean the interior, rinse & air dry.