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Ships within 48 hours · Estimated delivery Sep 23 - Sep 28
eggs do not hatch in temperatures that low
Tested by NSF 53 to reduce 99
while safeguarding against heavy metal contamination
These units are designed for installation in standard air handling units and duct systems
Hydroponic Use: Add 1-2 oz per 5 gallons of reservoir water once to twice weekly
Sling Hygrometer Replacement Tubes - Fahrenheit - fits Sper Psychrometer #736710 Hydroponics eggs do not hatch inRefill for 20 to 120 Fahrenheit Sling Psychrometer Model #736710 These refill tubes use a red liquid and are specifically made to work with our high quality Sling Psychrometers.
US$ 22.40
US$ 20.00
US$ 24.00
