Eclat vent sprocket oil slickeclats vent sprocket with its distinctive oil slick finish features a tough 6061 t6 aluminium construction to ensure durability and features a sink on the inside which ensures perfect chain alignment on all setups it has also been cnc machined to reduce the weight and has a three spoke design to make your bmx unique features materialfull cnc 6061 t6 alloy thickness8mm axlebore23 8mm spindle compatiblity 19 22 and 24mm spindles adaptors supplied wei