The Matter Image One20Five wheel is a 125 mm wheel for tri-skates (rollerblades with three wheels inline).
Matter is the Mercedes of the wheels. All the Image wheels are E- or S-class equivalents, to continue the metaphor. The Matter Image wheel could be compared with the E-class of the famous car company. The Image wheel is very good for speed skates and every fitness skate will be enhanced with at least one quality level by using this Matter Image wheel.
The One20Five wheel is packed per 6 wheels, because it is intended to use on tri-skates.
(Unless you are a skeeler racer, you need hardness (durometer) F1, no matter (pun intended) what. Skeeler racers could vary between hardnesses F0, F1 and F2, depending on subtle environmental circumstances of the race court.)