[Internal Diameter] ø3.2/ø4.2/ø5.2/ø6.2/ø8.2/ø10.2/ø12.2/ø16.2
[Material] Thickness (t) 1.0 mm or less: Aluminum (A1050) / Aluminum
Thickness (t) 1.5 mm or more: Lead-free, free-cutting aluminum / Aluminum
[Surface treatment] Base material / Black anodized (BAL)