Features: 

1) Grade: 200 series, 300 series and 400 series

2) Sizes: 1 x 3, 1 x 7, 1 x 19, 3 x 17, 6 x 7 + 1WS, 6 x 19 + 1WS, 6 x 19S + 1WS, 6 x  
    25Fi + 1WS, 8 x 26WS + 1WS, 6 x 31WS + 1WS, 8 x 19W + 1WS, 8 x 25Fi + 1ws, 6  
    X 31WS + 1WS, 8 x 19W + 1WS,  8 x 26WS + 1WS, 8 x 31WS + 1WS, 8 x 19W +   
   1WS, 8 x 26WS + 1WS, 6 x 31WS + 1WS

3) Diameter: 0. 15 - 21mm 

4) Standard: DIN, SUS, BS, GB/T9944-2002