What wheels are these please?

[lavster]

Can you tell me what's the name of these alloys?
and will the 55mm centre caps fit or does it have to be exactly 56mm?
http://www.ebay.co.uk/itm/vw-mk3-golf-vr6-bbs-5x100-alloy-wheel-genuine-15-cross-spoke-totally-straight-/250950022907?pt=UK_CarParts_Acc_Wheels_tyres_Trims_Car_Rims_ET&hash=item3a6dc976fb

[wakeskater]

vr6  bbs  its says  i thought they all had 56 mm centers?