Use the end rail clamps for installation by securing two 1 3/8" pipes or rails together at a 90° angle when building your greenhouse frame. Attach each end rail clamp with a carriage bolt and nut to attach to the vertical uprights creating a rectangle or square shape. Verify that the tubes or pipes are level and measure and verify that the opening is the proper measurement for your fan.
(8) Rail Clamps
(4) 1/4" x 2.5 Carriage Bolts
(4) 1/4" Nuts
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