for existing device, enables other fastening variants for the following applications:
Attachment to very thick panes (A)
Two long screws permit the attachment of the holding devices supplied, also on thicker panes up to 39 mm (1.5 in.).
Attachment to frames (B)
The extension can be used to attach the holding device to aquarium rims up to 39mm (1.5 in.) thickness. The rim can project outward by about 10 mm (.4 in.).
Supporting attachment for horizontal panes (C)
It allows attachment on horizontal aquarium panes for 4 to 8 cm (1.6 to 3.1 in.) with an adjustable support. Especially suitable for COMLINE units.

1: Deutsch, English, Francais (x3000.2448)