Ok, thanks. For the record, the magnets on the Wavebox and 6105 specs as per Tunze say up to .74", which is why I asked. Specs copied and pasted below:
* Turbelle® stream 6105
* For aquariums from 200 to 2,000 litres (52 to 528 USgal.).
* Flow rate: 3,000 to 13,000 l/h (792 to 3,434 USgal./h).
* Energy consumption: max. 45 W.
* Voltage / frequency: 100 – 240 V / 50 – 60 Hz.
* Cable length: 5 m (196.8 in.).
* Dimensions: diam. 90 mm (3.5 in.), Outlet: diam. 50 mm (1.96 in.).
* Magnet Holder up to a glass thickness of 19 mm (.74 in.).
* Magnetic Holder 6200.50 (included in Wavebox now): for all Turbelle up to 65 W and one Comline component each up to 19 mm (.74 in)