Specifications

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Flexfab Silicone Coolant Hose
4 ply blue silicone coolant hose reinforced with polyester
fabric and coated with specially compounded silicone
elastomer. Operating temperature is -65⁰F to +350⁰F. Meets
or exceeds the requirements of SAE J20 R1 Class A, TMC
RP303B Class I Grade I and most OEM truck manufacturers
specifications.
Application: Coolant Hose
Specification: SAE J20 R1 Class A
Cover Color: Blue
Standard Temperature: -65ºF to +350⁰F
Length
3'
3'
3'
3'
3'
3'
3'
3'
3'
3'
3'
3'
3'
2-1/4
2-3/8
2-1/2
2-5/8
2-3/4
3
3-1/4
3-1/2
3-3/4
4
4-1/2
5
6
Item #
FLX5581-225
FLX5581-238
FLX5581-250
FLX5581-262
FLX5581-275
FLX5581-300
FLX5581-325
FLX5581-350
FLX5581-375
FLX5581-400
FLX5581-450
FLX5581-500
FLX5581-600
Inside
Diameter
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
2
2-1/8
Item #
FLX5581-050
FLX5581-062
FLX5581-075
FLX5581-087
FLX5581-100
FLX5581-112
FLX5581-125
FLX5581-138
FLX5581-150
FLX5581-162
FLX5581-175
FLX5581-200
FLX5581-212
Inside
Diameter
Flexfab Silicone Heater Hose
Blue Hose/ Red Core silicone heater hose reinforced with
nylon fiber reinforced. Resistant to coolant additives.
Operating temperature is -65⁰F to +350⁰F. Meets
TMC RP303B Class I Grade 2 specification.
Application: Heater Hose
Specification: TMC RP303B Class I Grade 2
Cover Color: Blue
Standard Temperature: -65ºF to +350⁰F
Length
25'
25'
25'
25'
25'/50'
25'/50'/300'
25'/50'
25'/50'
25'/50'
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
1-1/4
Item #
FLX5526-025
FLX5526-031
FLX5526-037
FLX5526-050
FLX5526-062
FLX5526-075
FLX5526-087
FLX5526-100
FLX5526-125
Inside
Diameter