Primerus 1/8 Inch Punch (3mm)
$12.95
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Professionals use this punch, with its specially designed punch tip, for making holes in mainline poly tubing to insert 1/8" poly tubing directly in without the use of a barbed coupler. After a short time the flexible poly will seal around the micro tubing creating a water-tight seal. This will also punch holes sized to insert any of the 1/4" barbed fittings into your mainline.
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