uxcell 6x20x1.5mm 304 Stainless Steel Flat Washer Spacer 30pcs for Pop Rivet Product Name: Flat Washer; Material: 304 Stainless Steel Weight: 89g; Package Content: 30pcs x Flat Washer Main Color: Silver Tone; Inner Dia: 6mm/ 0.24" Outer Dia: 20mm/ 0.8" Thickness: 1.5mm/ 0.06"