This is one wheel chock, Brand new.  I have copied the specs and pasted below, for your convenience.  The yellow portion Is made out of steel, FYI.  so it is heavy.  Fast shipping!

Secure-grip rubber wheel chocks don't slide on pavement to ensure the chock holds fast. Rubber is weather resistant and suitable for use with trailers, trucks, and commercial construction equipment. They are less durable than laminated rubber chocks.

Brand
VESTIL
Material
Rubber
Overall Length
19-1/2 in
Overall Height
37-1/8 in
Overall Width
8 in
Number of Chocks
1
Primary Use Application
Trailers
Surface Tread Type
Grooved
Includes Chain/Rope
Chain/Rope Not Included
Includes Handle
Handle Included
Handle Type
Ergonomic
Includes Eye Bolt
Eye Bolt Included
Includes Sign
Sign Not Included
Color
Black; Yellow
Manufacturer Part Number
RWC-8-ERGO
UNSPSC
24101808
Country of Origin
China (subject to change)