Hevi-Bar II, 300 Amp Single Standard Collector With Shoe. 42" Long Pigtails, 2 AWG, are Supplied on the Collector. The 300 Amp Single Collector has an Additional Tension Spring on the Arm versus the 200 Amp Single Collector. Customer Supplied Wiring Connects to the Collector Pigtail With in-Line Connectors. USED ONLY ON 700 - 1500 AMP CONDUTOR BAR. Do Not Use Single Collectors if Expansion Sections,, Radio Controls, or Transfers Exist on the System.