Top quality seals kit from SIP for Vespa PX80, 125, 150 & 200 E 98' MY 2011 or 2012 model, T5 and Cosa. 
These are all protected by CORTECO. The blue type are a little tougher than the black type which can be found in most engines as an original PIAGGIO component. The brown seals are produced using a fluoro polymer material (FPM) are especially heat resistant (up to 160 degrees and are harder wearing with more resistance against oil. Both types see wide spread use in all two - stroke motors.
 
Fly seal, blue - 24 x 35 x 6
 
Metal drive seal, brown - 31 x 62 x 4.3 x 5.8
 
Rear hub seal, blue - 27 x 42 x 10 mm
 
 
It is recommended you use loctite on the drive seal to secure it in the casing.