Marathon offers a variety of clamping options to suit your needs.

Standard Clamping Strap	Flange Lock Up
Low thermal expansion alloy strap to tighten around whole circumference of heater, allowing maximum contact between the heater and working surface. 5/8" strap on heaters greater than 1.5" wide. 1/2" strap on heaters less than 1.5" wide. Standard gap is .30".	Good option for heaters with lots of holes or cut outs. 1/2" clearance required
Welded on Barrel Nuts	Wedgelock
Best option for heaters with lots of holes or cutouts. No strap to lose. 5/8" clearance required.	Low profile is ideal for minimum clearance applications.  Only 1/8" clearance required.