From the Manufacturer:
Century stands, more commonly known as "C" stands, have been the most common type of grip equipment used by the filmmaking industry for decades due to their strength and flexibility. Used on its own or in combination with a grip head and grip arm, the C stand is used for mounting lighting equipment and a whole variety of light shaping tools and accessories.
The Kupo Master C Stand with Sliding Base has two legs that are spring loaded to open in fixed positions, while the third leg is height adjustable by loosening a locking knob and sliding it up and down the main riser section. This enables the user to raise one leg higher than the others to level out the stand on an incline or uneven terrain. It comes in really handy on some stairs!
C Stands get their sizing from the length of their riser sections. This 40" double riser stand has two telescoping risers and one main section for a total of 120". Add the height of the base and you arrive at your maximum height
All Century Stands feature a unique base specially designed with three varied leg heights. This enables the user to stack or "nest" the stand bases so that the risers are just inches apart from one another for use in close proximity mounting of lights and other grip equipment or easy storage.
The Master C Stand features a zinc alloy casting on its base that's five times stronger than aluminum to sustain the weight of heavy sandbags and people standing on it
The aluminum casted locking collars are outfitted with a stainless steel heli-coil that protects the aluminum from being damaged by the knob's stainless steel bolt for strength and durability.