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Code
external diameter
imperial tube
inches
mm
SFF-1
1/16"
1.59
SFF-2
1/8"
3.17
SFF-3 3/16" 4.76
SFF-4 1/4" 6.35
SFF-5 5/16" 7.93
SFF-6 3/8" 9.52
SFF-8 1/2" 12.70
SFF-10 5/8" 15.87
SFF-12 3/4" 19.05
SFF-14 7/8" 10.22pm
SFF-16 1" 25.40
SFF-20 1-1/4" 31.75
SFF-24 1-1/2" 38.10
SFF-32 2" 50.80


















Code
external diameter
metric tube
mm
SFF-2M 2
SFF-3M 3
SFF-4M 4
SFF-6M 6
SFF-8M 8
SFF-10M 10
SFF-12M 12
SFF-15M 15
SFF-16M 16
SFF-18M 18
SFF-20M 20
SFF-22M 22
SFF-25M 25
SFF-28M 28
SFF-32M 32
SFF-38M 38