JEM Closed Star Piping Nozzle no. 31 Ideal for drop flowers, shells, rosettes and grooved stars Dimensions: Tip diameter 9.2 mm Base diameter 18 mm Height 31.2 mm No. of points: 9 All nozzles work with parchment piping bags, standard bags and couplers and are made from high quality seamless stainless steel. Hand wash in warm soapy water is recommended.