All the inductors are wound on T-60-2 powder iron cores, with 20ga  wire.
TACTICAL RADIO GEAR, LLC
Select the band at checkout: BUYER MESSAGE TO SELLER.
Everything needed for a complete Band Pass filter is included in the Kit.
50W Single Band HF Bandpass Filter Kit
Bandpass filters are essential, in preventing receiver front end damage during multiple HF radio operation. Tactical Radio filters are available for all HF amateur bands, including 6 meters.
Designed to provide a roll-off outside each Amateur band; these filters bring the benefit of a dramatically lower noise floor; for improved single-band, weak signal reception; necessary for contest and Field Day operations; or simply crowded band conditions!

These compact HF Transmit/receive filters, accomplish out-of-band suppression, that effectively eliminates noise and interfering signals. Simply place the filter in-line between transceiver, antenna or an amplifier.

If you are planning a DXpedition, a contest, or simply need the enhanced performance that a bandpass filter can provide, your radio needs these filters. Tactical Radio Gear, filters are the most cost-effective, single band filters on the market. The cutting-edge advantages, that these exceptional filters can provide; to improve image, and intrusive harmonic problems, for mono-band, multi-radio contest settings cannot be overstated.

The Tactical Radio, BPF-QRP series filter design, is based on a 3-pole Butterworth filter configuration(s), that maintain a 50 Ohm impedance, and low insertion loss.
These HF Transmit/receive Bandpass Filter PCB's, are of tremendously high-quality, designed to limit the RF bandpass to a single Amateur band.
Inputs and outputs are not at DC ground potential. Thus allowing a Bias-T to be used in the system.
Insertion: Typical, 0.5-.7db
Rejection: Typical, >40db band-to-band
Power Handling: 50W pep
Impedance (ohms): 50
Width (in): 1.5"
Depth (in): 3.5"
Height (in)  1.2"
Ship Weight: <1-lb.

VSWR & POWER CONSIDERATIONS

Silver Mica 5% 500V SM capacitors are  used exclusively.

Note: The BPF-50W filter(s)  can be operated @ a 100% duty cycle. SSB speech (50% duty), CW average power is roughly equivalent to speech.

The Universal PCB/Kit comes with complete instructions for constructing a Band Pass filter for the following bands: 160m/80m/40m/30m/20m/17m/15m/12m/10m/6m. 
The component values for each band, are provided in the instructions. Since the PCB is a universal layout, 
it will work for any of the listed bands. 
Purchase more than one kit for your favorite band(s). The capacitors provided in the kit are 500V 
Silver Mic caps. Inductors can be air-wound solenoid types, toroid cores are provided in each kit.
The PCB is high-quality FR4 material, with 2oz copper on both ground planes.
The instructions contain pictures to assist in the assembly. 
The circuit uses 3 different capacitor values, and 3 inductors of the same value.
Everything needed for a complete Band Pass filter is included in the Kit.
The same PCB is available as a bare board. It is listed separately.  
Easy, fast, and fun assembly with great performance.