Abstract: A support frame (1) for use with a kitchen sink (10), the support frame (1) having at least two extendable arms (2.1, 2.2) to hold the frame over a kitchen sink (10), which arms (2.1, 2.2) extend parallel to each other, defining a free space (3) therebetween, and are connected, at respective ends thereof, by connecting handles (4.1, 4.2). The arms (2.1, 2.2) each have at least two parts (2.1a, 2.1b; 2.2a, 2.2b) of different cross section, with a first part (2.1b, 2.2b) of smaller cross section slidably inserted into a second part (2.1a, 2.2a) of larger cross section, and the second parts (2.1a, 2.2a), at an end portion thereof, include a sealing element (2.1c, 2.2c), preferably a ring-shaped elastomeric or plastics seal, for slidably centering and aligning the first parts (2.1b, 2.2b) and said second parts (2.1a, 2.2a).