YOFAN Russian Piping Tips Set (3-Pack) HIGH QUALITY MATERIAL: Made of Food Grade 304 stainless steel. EASY TO USE - It takes only one step to make a beautiful Sphere Ball shape whip cream or buttercream. Making your own beautiful and unique cakes,puff,or pastry is so much easier with this right tools. DURABLE AND REUSABLE - Strong material SIZE:3cm(down end) by 5.7cm(height) by 2.2cm(up end)