Muscle Wire - shape memory alloy metal wire (0.3mm)

30 cm nickel-titanium alloy wire with shape memory. When it is in martensitic form, it can be flexed and deformed at will. After applying a current of about 200 mA or heating to 100°C, the wire returns to its original shape. SparkFun COM-11899

The kit converts the 180 degree rotary motion of a servo into linear motion. It is ideal for use in projects requiring horizontal or vertical motion. It consists of a 5 mm thick transparent blue plate with mounting holes and an FS90 servo. Kitronik 2595

A medium-duty linear cylinder, it can lift loads up to 100 kgf (1000 N) and withstand a static load of up to 450 kgf (4500 N), the nominal extension of the actuator is 25 cm. The power supply voltage is 12 V. This version of the actuator has a built-in potentiometer for reading the position of the actuator or, for example, feedback implementations. Pololu 3618

A miniature linear actuator that has a stroke range of up to 130 mm at a speed of 3 to 5 mm/s. It has a built-in motor and is powered by a voltage of 3 to 6 V

The medium-duty linear actuator can lift loads up to 100 kgf (1000 N) and withstand a static load of up to 450 kgf (4500 N), the nominal extension of the actuator is 10 cm. The power supply voltage is 12 V. This version of the actuator has a built-in potentiometer for reading the position of the actuator or, for example, feedback implementations. Pololu 3612

Concentric LACT12P-12V-20 Linear Actuator with Feedback: 12" Stroke, 12V, 0.5"/s

A miniature linear actuator that has a stroke range of up to 50 mm at a speed of 3 to 5 mm/s. It has a built-in motor and is powered by a voltage of 3 to 6 V

DC-AC converter, also referred to as an inverter. It converts a constant voltage (DC) of 12 V to an alternating voltage (AC) of 220 V, 380 V or 18 V