Silver Tone 316 Stainless Steel Flat Washer 1/2-inch 25pcs for Screws Product Name : Flat Washer;Inner Dia : 13mm/ 1/2" Outer Dia : 23.7mm/ 0.93";Thickness : 2.5mm/ 0.1" Material : 316 Stainless Steel;Color : Silver Tone Weight : 138g Package Content : 25 x Flat Washer