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Questions & Answers
what size do I need for vx 3i 4.5- 14x 50 Expert Answer

Butler Creek states you will need Code:BX-R2-ECECDE-21314.

by Bethany Kopel, Gear Expert, April 1, 2021
My Vortex Viper 1-4 scope has an exactly 40mm rear lens. The listing here is one choice for two sizes; 13, 14. What's up? Expert Answer

According to Butler Creek's fit chart, you will want the size 16-18 CODE: BX-R2-ECECDE-21618.

by Bethany Kopel, Gear Expert, April 1, 2021
Customer Reviews
Helpful Positive Review Excellent ocular lense cover by Legacy Reviewer, Verified Owner, January 3, 2011
The Butler Creek ocular eyepiece is excellent. Easy fit, easy opening and the cover stays shut until the you press the button. Make sure you get the right size. The Butler Creek objective lenses are NOT the same. There is no push button just ...
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3/3 found this helpful
Helpful Positive Review Multi-Flex Flip-Open Eyepiece Cover by Jim, September 5, 2014
This is a very good product. I have them on all my scopes. Keeps dust off the glass. OpticsPlanet had a good price on this product as I have ordered them before as well as other products. If you haven't tried them, I would recommend them highly. ...
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1/1 found this helpful
Helpful Positive Review Multi Flex Lens Cover by Scott, November 9, 2015
This lens cover is pretty good. It is actually a replacement for an old one that has been on my scope for about 20 years or so. I guess that's pretty good bang for the buck. The only reason for the 4 and not 5 stars is because it still makes some noi...
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1/1 found this helpful
Helpful Negative Review Fits "Ok" by Legacy Reviewer, April 25, 2011
I bought one of these for the Burris Fullfield II Tac30 scope I purchased here. Stick to the orginal... even after carefully selecting the proper size I wasn't happy with the way they functioned on the scope. I had to pull it halfway off just so that...
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4/4 found this helpful
Most Recent Reviews good Eyepiece by Joe Grunt, Verified Owner, May 7, 2018
I switched out my old 1 piece stretchy Eyepieces for these. These are much better and you don't have to worry about losing them. I'm using these on my Primary Arma 4x14, Primary Arms 1x8, and Primary Arms 3x scopes.
Most Recent Reviews lens covers by airedale, Verified Owner, July 13, 2015
These are good covers, comparing them to the regular Butler Creeks they seem just as well constructed and perhaps easier to adjust if your cover cap is a bit smaller then needed. Just heat them up with a blow dryer and put them on a larger diameter t...
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Read All 12 Reviews
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Product Info for Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers

Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers on sale and available from our online store. OpticsPlanet, Inc is an Authorized US Distributor for Butler Creek Rifle Scope Accessories.image

The incredible lens protection of Butler Creek standard Flip-Open Covers, but with additional flex in the collars to fit a wider range of scopes and the added convenience of purchasing front and rear covers together.

  • Same basic features and design as standard Flip-Open series.
  • Tight, flexible collar provides custom fit for multiple scopes.
  • Purchase by the pair – eye and objective cover provided

Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers is available with the following options:

  • Butler Creek 20909 Black Eye Cover, Size 09 - 09A (1.468 - 1.485 inches / 37.3 - 37.7mm)
  • Butler Creek 21011 Black Eye Cover, Size 10 - 11 (1.516 - 1.550 inches / 38.5 - 39.4mm)
  • Butler Creek 21314 Black Eye Cover, Size 13 - 14 (1.570 - 1.605 inches / 39.9 - 40.8mm)
  • Butler Creek 21618 Black Eye Cover, Size 16 - 17 - 18 (1.660 - 1.700 inches / 42.3 - 43.2mm)
  • Butler Creek 21920 Black Eye Cover, Size 19 - 20 (1.73 - 1.775 inches / 43.9 - 45.1mm)
WARNING: California`s Proposition 65

Features of Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers:

  • Same basic features and design as standard Flip-Open series
  • Tight, flexible collar provides custom fit for multiple scopes
  • Waterproof, airtight protection
  • Covers open silently with the flick of a thumb

Package Contents:

  • Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers

Butler Creek Multi-Flex Flip-Open Rifle Scope Eyepiece Lens Covers Orderable Models

List of Orderable Models

Butler Creek Black Eye Cover 43.9 - 45.1mm 21920 , MPN: 21920 , UPC: 051525219200 , Code: BX-R2-ECECDE-21920
Butler Creek Black Eye Cover 39.9 - 40.8mm 21314 , MPN: 21314 , UPC: 051525213147 , Code: BX-R2-ECECDE-21314
Butler Creek Black Eye Cover 42.3 - 43.2mm 21618 , MPN: 21618 , UPC: 051525216186 , Code: BX-R2-ECECDE-21618
Butler Creek Black Eye Cover 37.3 - 37.7mm 20909 , MPN: 20909 , UPC: 051525209096 , Code: BX-R2-ECECDE-20909
Butler Creek Black Eye Cover 38.5 - 39.4mm 21011 , MPN: 21011 , UPC: 051525210115 , Code: BX-R2-ECECDE-21011
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