HOOMORE branded Si3N4 Ceramic Speed Bearing for Inline Speed Skates Shoes Professional Race 608RS 7 beads Black Ceramic 16 pcs

the bearing is Si3N4 black ceramic bead, suit for professional speed skating; 7-beads design, with excellent stability and never deformed; the ring is GC415 Chrome steel, stainless and strengthen; it is 16 pieces bearing with beautiful container;