Vespa PX side stand

I bought a Cuppini side stand from SIP ( http://www.sip-scootershop.com/EN/Products/75081000/Side+stand+CUPPINI+PXT5.aspx )

It mounts betwen the cross member under the footboards and the exhaust - Can anyone tell me what size bolts I need to fit it?

Thanks

c7 

M6 bolts usually 25mm is long enough, M6 nuts with 10mm external dimensions.

size of the bolt is 1/2 and the nut size is 10