uxcell 100pcs Black Rubber Tattoo Machine Needle Bar Grommet 6mm x 11mm x 5mm Product Name : Needle Bar Grommet;Size : 6 x 11 x 5mm/ 0.24" x 0.43" x 0.2"(Inner Dia*OD*T) Groove Width : 1.5mm/ 0.06";Color : Black Material : Rubber Weight : 32g Package Content : 100 (+/-2%) x Needle Bar Grommets