uxcell M3 x 7mm Internal Tooth Star Lock Washers Silver Tone 50 Pcs Product Name: Internal Star Washer; Material: 304 Stainless Steel Weight: 9g; Package Content: 50(+/-2%) x Internal Star Washer Main Color: Silver Tone; Inner Dia: M3/0.12" Outer Dia: 7mm/0.28" Thickness: 0.8mm/0.03"