[304 stainless steel construction]: Made of high-quality 304 stainless steel, these spring and washer kits are durable, rust-resistant, and long-lasting, ensuring a longer service life for your mixer. [Reducing Wear]: This spring and washer can securely locking the mixing attachments onto the shaft,and extend the life of the mixer by reducing wear. [Food Grade Stainless Steel]: Our parts are all made of food-grade stainless steel to ensure durability and no rust. [Quick Installation in 1 min]: Our spring and washer are very easy to install and do not require disassembly. [Scope of Application]: This spring and washer compatible with all for KitchenAid Tilt-head andamp Bowl-lift mixers from 3.5 Quarts to 7 Quarts, Classic, Artisan, Pro-Line. Colour:Silver Material:Stainless steel Package Contents: 4 x Spring 4 x Washer 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.