Raza Industries

The one on the left, with a shorter, straight spout and a handle on the side, is generally known as a Plastic Sink Cock.
The one on the right, with a longer, curved spout that resembles a swan's neck, is called a Plastic Swan Neck Tap or Swan Neck Sink Cock. This design provides more clearance for washing large dishes or filling pots in the sink.
Both are made of plastic materials like PVC, PTMT, or ABS, making them lightweight and resistant to rust. They are typically used for cold water supply and are mounted on the deck or countertop of the sink.