83mm Straight Hose - 500mm Colour:Blue Hoses It has an internal 1/4

It has an internal 1/4 UNF thread with a length of 52mm (Measured from the center of the hole to the end of the turnbuckle)

19mm 90° Elbow Silicone Hose

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The band threads are pressed in (rather than perforated) which enhances the thread strength and presents a smooth and snag-free band surface to the hose

83mm Straight Hose - 500mm Colour:Blue Hoses It has an internal 1/483mm Straight Hose 500mm Technical Details Inside diameter: 83mm (3 1 4") Overall length: 500mm (19 11 16") Wall thickness: 5mm (3 16"). Layers of reinforcing fabric: 4. Reinforcing material: Polyester. Liner: Silicone. Operating temperature: 40C to +180C Also available in 1 Meter lengths.