If you do not see your specific optic listed, measure the outside diameter of the eye piece of your optic. Then look at the spacer variant sizes , then pick the spacer that fits your measurement.

 

Mini 1.35-1.44"

Alpha 1.55-1.64"

Bravo 1.65-1.74"

Charlie 1.75-1.84"

Delta 1.85-1.94"

Echo 1.95-2.04"

Foxtrot 2.05-2.14"

Gulf 2.15-2.24"

Hotel 2.25-2.34"

Binoculars:

Razor UHD = Bravo

Razor HD = Alpha

Kaibab HD = Delta

Fury HD = Bravo

Viper HD = Bravo

Diamondback HD = Bravo

Diamondback HD(28mm) = Mini

Crossfire HD = Bravo

Raptor = Bravo

Spotting Scopes:

Razor HD (13-39x56) = Delta

Razor HD gen 2 11-33x50 = Charlie(Rolled Eye cup)

Razor HD gen 2 22-48x65 = Hotel

Razor HD gen 2 27-60x85 = Hotel

Viper HD gen 2 = Gulf

Razor HD gen 1 20-60x80 = Delta

Razor HD gen 1 11x33 = Charlie (Rolled Eye cup)

Viper HD gen 1 = Foxtrot

Diamondback 20-60x60 = Bravo

Diamondback 20-60x80 = Echo

Razor HD gen 1 16-48x65 = Gulf

Razor HD gen 1 20-60x85 = Gulf

Binoculars:

BX-5 Santiam HD 10s/12s = Charlie

BX-5 Santiam HD 15's = Delta

BX-4 Pro Guide HD = Bravo

BX-2 Alpine HD = Charlie

BX-1 Mckenzie HD = Bravo

Spotting Scopes:

SX-5 Santiam HD = Gulf

SX-4 Pro Guide HD = Hotel

SX-2 Alpine HD = Hotel

Mark 4 = Bravo (Requires Mk4 Eye Cup sold Separately)

Binoculars:

CL Pocket 10x25 = Mini

EL 10x50 W B = Bravo

EL 12x50 W B = Bravo

EL Range 10x42 = Bravo

NL Pure 12x42 = Bravo

SLC 15x56 W B = Bravo

Spotting Scopes:

ATX eyepiece module = Hotel

BTX eyepiece module = Alpha

STX eyepiece module = Hotel

STC = Gulf

ATS STS = Gulf

ATM & STM = Gulf

Binoculars:

ZULU16x42 Stab = Alpha

Kilo 3000 BDX 10x42 = Delta

Zulu7 10x42 HDX = Bravo

Zulu6 stabilizing = Bravo

Spotting Scopes:

Oscar 7 20-60x82 = Delta

Oscar 8 27-55x80 = Foxtrot

Spotting Scopes:

TS-82 = Delta

CFS 6-36 x 50mm = Echo

Spotting Scopes:

S65 = Gulf

S85 = Gulf

Binoculars:

B1.2 = Bravo

B.5 = Bravo

B.6 = Bravo

Spotting Scopes:

S.1 = Gulf

S.2 = Delta

S.3 = Gulf

Binoculars:

Terra ED = Bravo

Victory SF 10x32 = Bravo

Victory RF 10x42 = Bravo

Conquest 10x42 = Bravo

Spotting Scopes:

Conquest = Foxtrot

Binoculars:

Geovid 10x42 = Bravo

Geovid 10x42 R = Bravo

Noctivid 10x42 = Bravo

Spotting Scopes:

Sizing Coming Soon

Binoculars:

Drop Tine = Bravo

Signature = Bravo

Spotting Scopes:

Signature = Foxtrot

Binoculars:

Venture 10x42 = Bravo

Binoculars:

RD = Bravo

Binoculars:

Intensity = Charlie

Spotting Scopes:

Instinct = Delta

Krotos 85mm = Gulf

Intensity = Hotel

Binoculars:

Legend = Bravo

Forge = Bravo

Prime = Bravo

All Purpose = Bravo

Fusion = Charlie

Powerview 20x50 = Mini

Powerview 12x50 = Mini

Spotting Scopes:

Prime = Charlie

Trophy Extreme = Charlie

Binoculars:

Acculon 12x50 = Charlie

Acculon10-22x50 = Bravo

Prostaff 10x42 = Bravo

Prostaff 12x50 = Charlie

Spotting Scopes:

TSN-99 = Gulf

TSN-880 = Gulf

TSN-770 = Gulf

TSN-550 = Echo

Spotting Scopes:

Endevor = Foxtrot

560A 15-45x60 = Alpha

Spotting Scopes:

Miostar = Delta

Spotting Scopes:

Ares uhd 65mm = Foxtrot

If you do not see your specific optic listed, measure the outside diameter of the eye piece of your optic. Then look at the spacer variant sizes at the very top, then pick the spacer that fits your measurement.