Material: Metal C138: The outer diameter: 0.657 " or 16.7mm,The inside diameter: 1/2" or 12.7mm C139: The outer diameter:7/8 "or 22mm,The inside diameter: 5/8" or 16mm C140: The outer diameter:1" or 25mm,The inside diameter:3/4" or 19mm C141: The outer diameter:1.256 or 31.9mm,The inside diameter:1"or25mm C142: The outer diameter:1.622 "or 41.2mm,The inside diameter:1.5"or 38mm C143: The outer diameter:2 3/8 "or 60mm,The inside diameter:2"or 50mm C144: The outer diameter:3.3" or 85mm,The inside diameter:3"or 76mm Quantity: 20 Pcs Use for Straps, Bags, Purses, Belting, Ribbon and so on ***************************** ---------------------------------- Shipping : We will ship your items as soon as possible. Please ensure the shipping address you attached is correct. This is international shipping ! Shipping usually cost 12-18 working days ( 2-3weeks) by Airmail from post office. Or you can contact me to upgrade shipping to Express which can arrive in a week. I always ship it on time but please allow 5-10 days delay, sometimes there is a delay because of the delay in Customs. ***************************** ---------------------------------- Payment method: The Paypal is only available. ***************************** ---------------------------------- Communication If satisfied by our products,please give us the constructive feedback. Your feedback will be one of the most valuable things to us. If not satisfied about our products or needing more information, please feel free to e-mail to us.