Contesub Handle Ballast is a shaped plate made from stainless steel for stacking under the Contesub handle grip. All have the same shape and the same position of the holes - only change is the thickness and, therefore, the weight.
Details as per attached picture. The price refers to a single plate. For fixing you can use a pair of stainless steel self-tapping screws or M4 metric with a threaded insert.