Metal ferrules may be of aluminum, nickel, copper, or nickel-plated steel. Adamant Namiki offers optical components with a focus on ferrules, sleeves, and connectors. It has carbon fiber and kevlar monocoque structure with aluminium ferrules. Brass ferrules are sometimes used, especially for snooker cues. Officers wore silver epaulettes, braiding and ferrules. There are ferrules decorated with floral scrolls at both ends of the grips. It consisted of brass ferrules and balls. The bails also act as retainers for the lug ferrules. Wires with metal ferrules at each end were placed in the hubs to make connections. Nose grease is often recommended as a lubricant for fly fishing rod ferrules. Lances, ferrules, daggers and arrowheads were found, apart from beads of gold and terracotta objects. Officers wore silver epaulettes, braiding and ferrules, the latter in their "czerkeskas". In smaller units some manufacturers use ferrules to seal the tube ends instead of rolling. But the sticks also got iron ferrules fitted onto its narrow end as well. Barongs used in World War II may also have aluminium ferrules.