The images on the fluid-hub product pages are purely illustrative and may not accurately represent the exact product, especially for configurable variants (for example, vane pumps with different rotation and orientation). To understand how the configuration works, read What does it mean that a product needs to be configured?
For exact technical specifications, always refer to the manufacturer's technical data sheet in PDF, available in the "Technical details" section of each product page. To find out more about how to download the technical data sheet, read Can I download the technical data sheets if I am not registered? 
For overall information on the product page, read What information can I find on the product page? If you have technical doubts about the product, read In case of technical doubts before purchase, who can I contact?