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Mastiff 400L/54 Double Swing Gate Opener

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Mastiff 400L/54 Double Swing Gate Opener. Long arm length for longer gates.


$1,499.00 incl GST

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The longer arm version of the heavy duty Mastiff swing opener for longer double gates.

Operating Stroke 540mm


  • 1) 2 x 24v Actuator Motor with Aluminium casing and Stainless Ram.
  • 2) Standard Mounting Brackets.
  • 3) CB17 Outdoor Control Box with control board, built-in RF receiver/antenna and external cable glands.
  • 4) Stand-alone Transformer.
  • 5) 3 x TM3 Transmitter.
  • 6) 1 x set of 24V Back-up Batteries.
  • 7) 1 x Outdoor Wireless Keypad.
  • 9) Instruction Manual

Fully closed length between centres of bracket pivot pins: 990 mm

Fully open length between centres of bracket pivot pins: 1540 mm (Only use 1520mm max for setup allowing for 20mm spare giving a 520mm true stroke length)

NOTE: If your posts are more than 200mm wide, you will not be able to hinge the gates in the centre of the posts, they should then be hinged towards the inside property edge of the posts, no more than 100mm in from the post corner.

The Mastiff arms have a keyed release mechanism in them to allow manual movement if ever required (and is used during install). 


System Power24v
Number of Remotes Included3
Keypad IncludedYes - Wireless
Warranty12 months 'back to base'
Transformer IncludedStand-alone, plug in