Specification: Product name: Ring Terminals Material: copper Color: gold Size: 13 x 6.5 x 2.2cm/5.1 x 2.6 x 0.9 in Type: M3 M4 M5 M6 M8 M10 Inner diameter: 3.5mm/0.13 in, 4mm/0.15 in, 5mm/0.2 in, 5.5mm/0.21 in, 8mm/0.3 in, 9mm/0.35 in Quantity: 150pcs, 450pcs (optional) Application: solar system, household appliances, distribution box, automotive, electrical industry, mechanical equipment. Note: Please allow 1-3cm measuring deviation due to manual measurement. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Parts List: 150Pcs: 50* M3 x 3.5mm 20* M4 x 4mm 20* M5 x 5mm 20* M6 x 5.5mm 20* M8 x 8mm 20* M10 x 9mm 450Pcs: 150* M3 x 3.5mm 60* M4 x 4mm 60* M5 x 5mm 60* M6 x 5.5mm 60* M8 x 8mm 60* M10 x 9mm Copper Material:These ring terminals are made of high-quality copper material, which are durable and strong, have nice electrical conductivity, heat resistance and corrosion resistance, and will serve you for a long time. Good Sealing:The closed design of these copper terminal connectors seal out the moisture, and the temperature durability prevent deforming, ensure the safety of use. The common sizes of the copper connectors are convenient for use. Easy Crimping:Heavy-duty terminals improve high-temperature durability and ensure connection reliability, open barrel making them easy wire insertion. These battery lugs can be crimped or welded to the cable end according to your preference. 6 Different Sizes:Our copper ring terminals assortment kit has 6 different types: M3 x 5mm, M4 x 4mm , M5 x 5mm, M6 x 5mm, M8 x 8mm, M10 x 9mm. All o