ITEM NAME:140PCS Car Copper Ring Lug Terminal Heat Shrink Tubing Battery Wire Connectors.Heat Shrink Tubing Material: Tin Plated Copper. Made from Copper for max current flow. Wire & Stud Sizes Stamped on the Pad. Color: Silver. Size: SC25-8 5pcs; SC25-6 5pcs; SC16-8 5pcs; SC16-6 5pcs; SC10-8 10pcs; SC10-6 10pcs; SC6-8 10pcs; SC6-6 10pcs.