uxcell 1000Pcs 4mm Inner Dia Armature Wire Rubber Grommets for Tattoo Machine Product Name : Needle Bar Grommet;Material : Rubber Size : 4 x 10 x 5mm/ 0.16" x 0.4" x 0.2"(Inner Dia*OD*T);Groove Size : 6 x 2mm/ 0.24" x 0.08"(D*W) Color : White Net Weight : 138g Package Content : 1000 (+/-2%) x Needle Bar Grommets