Diameter(mm): 2.4  3.2 4.0 5.0 6.0 8.0 10.0
Hole(mm): 0.8 1.2 1.5 1.8 2.5 2.8 3.8

Available material: Brass, Carbon steel, Stainless steel  
Available finishes: Cleared, Chrome plate, Nickel plate, Silver plate Brass plate, Polished, and so on.