Greg Bender
http://www.thisoldtractor.com/gtbender
This information was gleaned from eurocarb. I meticulously recreated the table of values from a difficult to read original. Therefore, mistakes may be present. Here is a link to the original image in case you would like to scrutinize any particulars.

PHBG carburetor slide needle
Table: Slide needle series 9595 X 08 W
| Type | Value X | Characteristic expressed in millimeters | ||
|---|---|---|---|---|
| ØA | ØB | C | ||
| W1 | 1 | 2.45 | 0.60 | 24 |
| W2 | 2 | 2.45 | 0.50 | 22 |
| W3 | 3 | 2.45 | 1.40 | 20 |
| W4 | 4 | 2.45 | 1.40 | 18 |
| W5 | 5 | 2.45 | 1.40 | 15 |
| W6 | 6 | 2.50 | 1.00 | 24 |
| W7 | 7 | 2.50 | 1.40 | 18 |
| W8 | 8 | 2.50 | 1.40 | 15 |
| W9 | 9 | 2.50 | 1.40 | 20 |
| W10 | 10 | 2.50 | 1.80 | 15 |
| W11 | 11 | 2.50 | 1.80 | 18 |
| W12 | 12 | 2.50 | 1.80 | 20 |
| W13 | 13 | 2.50 | 0.50 | 22 |
| W14 | 14 | 2.50 | 0.50 | 24 |
| W15* | 15 | 2.50 | 0.60 | 25 |
| W16 | 16 | 2.50 | 1.00 | 22 |
| W17 | 17 | 2.50 | 1.00 | 26 |
| W18 | 18 | 2.45 | 0.50 | 24 |
| W19* | 19 | 2.50 | 1.80 | 20 |
| W20 | 20 | 2.50 | 1.60 | 24 |
| W21* | 21 | 2.50 | 1.60 | 24 |
| W22*~ | 22 | 2.50 | 0.60 | 25 |
| W23 | 23 | 2.50 | 0.60 | 26 |
| W24 | 24 | 2.50 | 1.80 | 24 |
| W25 | 25 | 2.50 | 1.80 | 22 |
| * Constructed of anodized aluminum ~ Differs from W15 in length; W22 has a length of 42.6 | ||||