Dog Trace | Notch Connectors For Connecting Antenna Wire | 4 pcs VNT Electronics Sale! from 450 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Notch connectors are used to connect the antenna wire for electronic invisible fences d-fence. Suitable for wire cross section 0.75 - 2.5 mm 2 . Tweet