Orings - 3/8" to 7/8" (9,5 - 22.2mm) OD (Bag of 5) (Click to Select Size)
Orings sized 3/8" to 7/8" (.325" to .875") Outside Dimension (OD). Use to stop First Contact Polymer from flowing on or under optics retaining rings. Measure the Inside Dimension (ID) of your retaining ring to select the correct oring size OD from the drop down menu. Orings 3/8" to 7/8" are sold in bags of 5.
Orings - Custom Size 5 To 10 Inch (127.0 to 254.0mm) OD (Sold Individually)
Orings are used to stop First Contact Polymer flow on or under optic retaining rings (or retaining flanges if retained from backside). We will manufacture a custom sized oring to fit your optic.
Measure the Inside Dimension (ID) of your retaining ring, mirror cell, etc. to select the correct oring size OD and enter the size in the space provided. Custom size orings are sold individually.
Orings - Custom Size 10 to 20 Inch (254.0 to 508.0mm) OD (Sold Individually)
Orings are used to stop First Contact Polymer flow on or under optic retaining rings (or retaining flanges if retained from backside). We will manufacture a custom sized oring to fit your optic.
Measure the Inside Dimension (ID) of your retaining ring, mirror cell, etc. to select the correct oring size OD and enter the size in the space provided. Custom orings are sold individually.
Oring Kit - 1" to 4.75"
An oring kit for someone with a wide variety of optics! Contains a full range of orings from 1 inch to 4.75 inches, in 1/4 (one fourth) inch increments, and also a single edge razor and super glue to custom fit the orings if desired.