Fire Door Gap Gauge Checker Tool, Small and Light, Pocket Fit

• Lightweight and durable plastic body
• Angular construction ensures no-fuss, intuitive use regardless of architrave
• Simple insert-and-glance design with clearly marked "Recommended Door Gap" area
• Compact design for easy storage and transport – fits in your pocket!
• Dimensions: 70 x 40 x 2-9 mm

The gaps between a Fire Door and its frame need to be 2 to 4mm in width to ensure that both the door can close smoothly and that the fire cannot spread through the gap of the fire door. Our Fire Door Gap Gauge is a handy tool designed with a clearly marked dark blue "Recommended Door Gap" area and red "Door Gap Not Recommended" area. Quickly tell at a glance if the gaps around a fire door are within the acceptable range.