Check the listing for details. K2 Ground Lug, 13mm Hex Set 4000006-H. Condition: New. Listed at 4.82 USD. The K2 Systems Ground Lug is installed from the top of the rail rather then on the side channel, making it easier for installers to quickly and efficiently ground there systems. UL 2703 Listed for bonding and fire - allows one lug per module row, eliminating cost and labor Aluminum made, high corrosion resistance roof hooks and rail Fast, simple installation with our preassembled universal bonding clamps and low part count RETURNS: At SanTan Solar, we work hard to ensure a positive shopping experience with us. For purchases made directly from our online store, if for any reason you are not fully satisfied with your purchase, you may return your products with the original package within 60 days if they are undamaged and unmodified. We cannot guarantee that your item will be accepted for a refund or exchange if it does not meet these requirements. Other extenuating circumstances require special authorization. SanTan Solar will pay the shipping costs of the returned item(s) for the following reasons: carrier damage, defective product, product inconsistent with advertisements, incorrect product received, or for any extra products you did not order. For all other reasons, customers are responsible for the return shipping fees. *Please Note: SanTan Solar will not accept returns with product modifications as it voids our warranty policy. Any modified products received will be returned to you at your expense.