About the product Brass Copper Base Bushing: 2-10pcs Brass Sleeve Base Bushing Inner Diameter 3mm 4mm 5mm 6mm 8mm 10mm 12mm Bearing Sleeve for Slide Block Length 4-20mm Color:Brass Material:Yellow Lubricant type: No lubrication Length: 4mm 5mm 6mm 8mm 10mm 12mm 15mm 16mm 20mm Inner Diameter: 3mm 4mm 5mm 6mm 8mm 10mm 12mm Outside Diameter: 5mm 6mm 8mm 9mm 10mm 12mm 14mm 16mm If you need more merchandise of alternative size, please contact visitor service. Package included: Depending on your choice Note: 1. Due to the several display screen and lightweight effect, the particular shade of the thing is probably slightly varied from the color showed on the pictures. 2. Please enable 1-3cm measuring deviation thanks to manual measurement. 3.If you have any questions, please be happy to contact me and I will help you clear up them and blissful that can assist you remedy it.Thank you! 4.If You Receive The Package Broken, Please Don't Open Dispute and Leave Negative Feedback, Please Contact Us Firstly, We Will Deal With It, Don't Worry !Thank you!