This Part is disabled and cannot be used.
It looks like this Part has been superseded by LEGO Part 3957a Antenna 1 x 4 with Rounded Top.
There are two known mold versions of this part:
3957a Antenna 1 x 4 with Rounded Top
This is the original version, introduced in 1979. The top of the antenna is rounded. This version is known in LEGO Digital Designer as 30064.
3957b Antenna 1 x 4 with Flat Top
This is the modern version, introduced in 2010. The top of the antenna is flat. This version is known in LEGO Digital Designer as 3957.
The mold comparison image shows both versions. If unsure, use the modern version 3957b.
LEGO mapping includes Design ID 30064 for the transparent (PC) version, and 54413 and 15609 for Metallic Silver version.