Check the listing for details. ANTENNA MAKING SUPPLIES/ DOG BONE INSULATORS AND STAINLESS ANTENNA WIRE CLIPS. Condition: New. Listed at 8.40 USD. Many many of my antenna buyers have asked for the supplies I use for the antennas I sell. Here is a good selection of the exact unique supplies I use. Please use the drop down box above to make your selection. The Dipole wire clamps are all Stainless Steel and require a 7mm socketWire Clamp Sizes 2mm through 4mm. These are great quality and this antenna hardware can last virtually forever, Please thread nuts on gently and don't force them and strip. They all go on nice and easy then tighten. Size 2 (2mm): This is best for 20AWG Wire and is a favorite for a good snug fit for 18AWG wire Size 3 (3mm):This is best for 14AWG and works great with 16AWG insulated wire as well Size 4 (4mm):This clamp is for 12AWG insulated wire. All Dog-Bone insulators are 3 inches long, solid nylon high quality and the hole size is 3/16 inches. I have provided all sizes for you to pick the correct one for yourself. No returns on these items unless I make a mistake with shipment.