What size are my laeger's pro-trax arms?

[ct350trx]

I bougth me laeger's pro-trax arms and the seller says that they are +3.
Buth I think they are +2.
Can anybody tell me what size they are. You can see on the picture they are 42,5 cm. So are they +3 are +2?

http://img526.imageshack.us/img526/1962/lengtearmennn9.jpg

[matt250r21]

The +3 t pin arms for my R are, bottom arm from bolt center to bolt center is 16.5 inches (43.5 cm), top arm is 12 inches from bolt center to the end of the a-arm where the jam nut is.

[ct350trx]

I think 16.5 inch is 42cm

Here is a calculator

http://www.industrial-enclosures.com/html/conversion-mm-inch.html

Than are mine also +3

[matt250r21]

I had a crappy metric ruler so your probably right. The inches measurement is spot on though.