NB

Collagen Type II has fibrils that are important for providing tensile strength to tissues.  It makes up 50% of all protein in cartilage and 85-90% of collagen of articular cartilage. It can be found in articular and hyaline cartilages, and the eyes. Purified collagen II does not exist by itself, only in combination with glucosamine & chondroitin. It is therefore a different product.
Collagen Type II has been listed at the US National Library of Medicine Medical Subject Headings (MeSH).^[1]

^[1] https://www.nlm.nih.gov/cgi/mesh/2011/MB_cgi?mode=&term=Collagen+type+II