This is the Ateco #12 standard decorating tube tip. The decorating tube tip fits with a standard coupler and it is made of stainless steel.
Specification
Ship Weight0.1 lb
ManufacturerAteco (August Thomsen)
Model Number12
Manufacturer Part #12
Type                    Piping Tips
Base Material Stainless Steel
Color                    Silver
Shape                    Round
Tip Size                    Standard
Style                    Plain
Base Diameter Size Small
Tip Opening Size 0.3 Inches
Hand Wash Only Yes