This is a rectangular shape aluminium beading, size shown as below:
The two sizes are inserted into the aluminium frame pocket when fixing the stainless steel mesh and one-way security mesh. Please measure the width of the pocket to determine the required size of beading.
For 316 stainless mesh:
The 6.5mm beading is used when the pocket width is 7.5-9mm.
The 5.5mm beading is used when the pocket width is 5.5-7mm.
For aluminium one-way security mesh:
Only 5.5mm beading is available, and the pocket width must be 7.5-8mm for the beading to fit.
Here are some photos of how to measure the pocket width; you can also measure it with a tape measure.
Measure with a tape measure at the top:
Door Frame:
Security Window Frame
Measurement with a Vernier calliper
Security Window Frame:
Flyscreen Door Frame:
Where to Measure:
When standing in front of the door, you need to measure the side pocket, not the pocket where the flyscreen mesh goes into; it is the pocket the diamond grille goes into if applicable. Or the pocket that is currently empty, if it is a flyscreen door.
For the security window frame, you also measure the side pocket. If you have a flyscreen window frame, then you cannot install the beading and security mesh into the frame.