Fits for different size jars, 12 oz to 30 oz max, including popular brands. Also fits for other food products like jam, butter etc. Made of stainless steel material, which is better than aluminum material. Stainless steel won't rust or corrode like aluminum does over time. Dishwasher is applicable. The handle design makes it much easier to stir the contents of large containers. It is a great tool that can be used in restaurants or at home. It's great for mixing peanut butter and jam in one jar! Also works well with any nut butter such as almond butter or cashew butter. You can even use it to mix honey into tea or coffee! A unique feature of our product is that we have included a scraper. This allows for easy removal of any excess nut butter from inside the jar. Colour:Silver Material:Stainless steel Package Contents: 3 x Peanut Butter Stirrer 3 x Scraper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.