1.XY-030 Xuanyi 2.-5 enlarged 3.cold press , tie-in 4. Material:copper 5.use:terminal connector,rf connector The material uses copper rod with type 59-1, surface treatment of nickel plated. Cold press series products all after heat treatment, will not craze when cold press. 3. Sealing ring choose ZY-850 type silicone rubber XY-033 Xuanyi F head rf switch connector