This is part of the product code for a levelling foot with an adjustable core, manufactured by Elesa & Ganter. The code consists of 7 parts:
DVC: This indicates the product group, in this case a levelling foot.
2-20-14-30-M6-18-55: This specifies the specific product characteristics, including the height of the foot (2mm), thread length (20mm), thread diameter (14mm), total height (30mm), thread size (M6), external diameter of the core (18mm), and the weight (55g).