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The internal diameter needs to match the retention zone (red line)--or area on the male post the O-Ring rests--to assure proper fit.

OSO O-Ring Instructions

OSO O-Ring Components

                                            

OSO Replacement Rings Size Chart

   

Internal Diameter (ID)

Outside Diameter (OD)

 

OSO Ring Sizing inch mm inch mm Price

White #2

Pkg 12

Mini

3/64"

1.20 mm

9/64"

3.57 mm $21.00
White #3

Pkg 12

Regular

4/64"

1.60 mm

12/64"

4.78mm

$21.00

Black #3

Pkg 6

Regular

4/64"

1.60 mm

12/64"

4.78mm

$27.00

Black #4

Pkg 6

Large

5/64"

1.98 mm

13/64"

5.16 mm

$30.00

Black #5

Pkg 6

Extra Large

6/64"

2.39 mm

14/64"

5.55 mm

$30.00

      Metal Retainer Rings #2 & #3 (ea) $21.00
      Metal Retainer Rings #4 (ea) $24.00
      Metal Retainer Rings #5 (ea) $25.00

 

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