It appears to be four of the NV11 Fairs Air Powered Suction Cup as already stated by Charlie Brumbaugh in his answer.
There are a lot of sources which claim that they were the used equipment. However, there is no real statement from the climber/police (!):
The man appeared to be relying on a series of NV11 Fairs Air Powered
Suction Cups, which retail at $280.22 each. The product is marketed as
able to lift up to 150 lbs, being ideally suited to picking up glass
or stone surfaces.
NV11 Fairs Air Powered Suction Cup
Semi-porous loads can be handled safely with this innovative air
powered suction cup.
Ideal for textured glass or slightly porous stone surfaces, this
unique Air Powered NV11 Fairs suction cup is designed for use with a
compressed air supply to ensure optimum safety and provide peace of
mind during lifting. The high-flow pad attaches quickly during
operation without the need for pumping and has an extra tough
all-metal handle. This specialist heavy duty suction cup is highly
suited to lifted and setting of semi-porous paving and stone flooring