45mm od, i cant remember exactly but i think its 640mm over all with a 416mm body. i just put them in my drum struts to get me by untill i go disc, so i cant be sure.

im going to use 81 pulsar shocks (monroe pn:25-3436) ,over all - 551mm and body lenth 334mm with 10mm less travel and same 37od body.. im using 51mm coil over sleeves, with a sleeve over the 120y made from 40nb 2.5mm wall tube (you need to cut it length ways and open it up then slide it over) and then welded that to the strut. i cut the strut down too 360mm from the top to the bottom where it bolts to the steering arm.