Hose Barb

Size

Walther
Code

mm inch
4 5/32 SL004
6 1/4 SL006
7 9/32 SL007
9 11/32 SL009
11 7/16 SL011
13 1/2 SL013
16 5/8 SL016
19 3/4 SL019
28 1-3/32 SL028
42 1-5/8 SL042
53 2-1/8 SL053
65 2-9/16 SL065

The Walther code is SL followed by the barb diameter in mm, to three figures.