All these parameter related are all specification for alloy wheels to applicated with different cars.
    
    Pls check the picture attached for wheel basic parts. As you see in the picture, for example for one group parameter:
    SIZE:17x7 ET:35 P.C.D:8x100/114.3 CB:73.1(the product that we quote to you on Apr. 13th )
    
    1. The "SIZE 17X7" means that Rim Diameter (No.1) is 17 inches, and Rim Width (No.2) is 7 inches, which are the two parameters
    of wheel rim size.
    
    2. The "ET 35" means that Offset (No.4) is 35mm, which is the distance between Hub Mounting Face and Wheel Center Line.
    
    3. The "P.C.D 8x100/114.3" also have two parts. Number 8 means the rim have 8 Bolt Holes (No.5), and number 100/114.3 means 
Pitch Circle Diameter(No.6)is 100mm and 114.3mm, which is circled by the point of Bolt Hole center line(see the red line in the left part). 
    Here it have two diameters means that the pitch circle diameter of 4 bolt holes is 100mm, and another 4 bolt holes' is 114.3mm. which
    are in order to let our after-market alloy wheel rims to be applicated for more car types. For original alloy wheels it always has one group P.C.D. 
    So if you can advise the four parts parameter of rims, we can supply many models for your reference.
      
    4. The "CB 73.1" means that the Hub Bore Diameter (the center of rim) is 73.1mm, which should be measured in the back side of the wheel rim.
  
Code of alloy wheel finishing color
1. S ----Silver 
    2. MS----Machine Silver
    3. SLP----Silver Lip Polish
    4. HS----Hyper Silver
    5. HSFM----Hyper Silver Fully Machine
    6. HSLP----Hyper Silver Lip Polish
    7. HB----Hyper Black
    8. HBFM----Hyper Black Fully Machine
    9. HBLP----Hyper Black Lip Polish
    10. BLK----Black
    11. MB----Black Machine
    12. BLP----Black Lip Polish
    13. MG----Gunmetal Machine
    14. NMG----New Gunmetal Machine
    15. CH----Chrome
    16. VC----Vaccum Chrome, Sputtering Chrome
    17. GLD----Golden
    18. GLDLP----Golden Lip Polish
    19. MC----Machine Copper/CB----Copper Bronze
    20. CMCLP----Copper Machine Center Lip Polish
    21. M/B----Matte Black
    22. MBM----Matte Black Machine
    23. MB/LP----Matte Black Lip Polish
    24. MB/CMLP----Matte Black Center Machine Lip Polish
    25. MBFR----Machine Black Full Red
    26. MBFB----Machine Black full Blue
    27. B/LPLR----Black Lip Machine Red Lip
    28. B/LPLB----Black lip Machine Blue Lip
    29. M/BLR----Matte Black Red Lip