305 MM / 11.9"

Pair of AMC/Ariel shocks 11.9" Fully shrouded. - AJS Models 16,18,20,31,18CS,31CSR/Matchless G3,G80,G9,G12,G80CS,G12CSR (1962) and Ariel NH/VH Hunter single (1952-59), KH Hunter Twin (1952-55), KH Fieldmaster twin (1956-57), VB Side valve (1952-59), FH Huntmaster twin (1952-59)

Fully Shrouded: YES
Chrome Springs: NO
Extended Length: 11.9"
Spring Rate: 110Lbs 
Top bush : 9.5 mm 
Bottom bush : 9.5 mm

or

325 MM / 12.9"
Pair of Universal Classic Shocks 12.9", 110lbs. Fully shrouded. Fits BSA A7/A10/B31/B32, AJS/Matchless (1963-), Triumph Pre Unit and Unit models etc 

Fully Shrouded: YES
Chrome Springs: NO
Extended Length: 12.9"
Spring Rate: 110Lbs 
Top bush: 9.5 mm 
Bottom bush: 9.5 mm