200pz Gomma di Ricambio 0.5mm 0.6mm O-ring Orologio Rondella Impermeabile Lavatrice B
10 Ports RGB Fan HUB PC Desktop SATA Power 5V 3PIN DRGB Extension Splitter. The rubber O-ring watch washer is used to keep the watch waterproof. A perfect substitute for the sealing gasket of the watch back cover.