The S133 weighs 18g, has a rectangular face measuring 16mm x 13mm, a body length of 20mm and has a continuous closed power rating of 1.6W while the S134 has the same body length but a narrower profile of 12.45mm x 10.7mm. Weighing only 10g and with a continuous closed power rating of 1.2W the low profile of the S134 means that it can be concealed in substrates as thin as some standard wood panels.
The coil configuration of both units operates at 6 or 12 VDC continuous, but can be over-powered to achieve additional force with a lower duty cycle.