uxcell 200pcs Stainless Steel Plain Finish M4 Flat Washer Spacers Silver Tone Product Name: Flat Washer; Material: 304 Stainless Steel Weight: 57g; Package Content: 200(+/-2%)pcs x Flat Washer Main Color: Silver Tone; Inner Dia: M4/ 0.16" Outer Dia: 9mm/ 0.35" Thickness: 0.8mm/ 0.03"