Here is data sheet from RS
Data Sheet RS Stock No. 521-5386
Cable Coax RG142 FEP brown 25m
Cross Section:
Description:
Rated Temperature (o
C): -70 ~ 200
Rated Voltage (V):
Product Standard Certification:
Flammability Test:
Construction:
Conductor: Silver Plated Copper Clad Steel
Conductor Dia. (mm): 0.94±0.02
Insulation: PTFE
Insulation Dia. (mm): 3.0±0.1
Braid Shield 1: Silver Plated Copper
Conductor Dia. (mm): 0.12
Conductor Qty: 16x7
Coverage: >90%
Braid Shield 2: Silver Plated Copper
Conductor Dia. (mm): 0.12
Conductor Qty: 16x7
Pitch(mm):
Coverage: >88%
Jacket: FEP
Outer Dia. (mm): 5.0±0.15
Colour:
The color of the insulation: Nature
The jacket color: Brown
Marking(3times/m):
RS 5215386 Cable Coax RG142 FEP brown
Performance:
Electrical Characteristics:
Frequency Attenuation(dB/100M)
700MHz 35.1
900MHz 40.4
1000MHz 43.0
2000MHz 63.3
Specified value (max.) is not more than 108% of the nominal
value
Character Impedance: 50 ohm
Capacitance: 95.1pF/M
Velocity ratio(%) : 70%
Check this page: http://nz.rs-online.com/web/p/coaxial-cable/5215386/