Color of Cap

Red

Blue

Yellow

Green

White

Code

Code

Code

Code

Code

Specification

6301R

6301B

6301Y

6301G

6301W

For 1/2 tubing

6302R

6302B

6302Y

6302G

6302W

For 1/2 connector

6303R

6303B

6303Y

6303G

6303W

For 3/8 tubing

6304R

6304B

6304Y

6304G

6304W

For 3/8 connector

6305R

6305B

6305Y

6305G

6305W

For 1/4 tubing

6306R

6306B

6306Y

6306G

6306W

For 1/4 connector

6307R

6307B

6307Y

6307G

6307W

For 1/8 tubing

6308R

6308B

6308Y

6308G

6308W

For 3/16 connector