Made for the Rollei bay 3 F2.8 lens type TLRs, may fit others but Rollei is the only bay 3 I know of. Includes two filter holders for series VI. As you may have noticed Bay 3 filter$$$ are expen$ive and there aren't that many options, series VI on the other hand has every color of the rainbow and then some and are a lot cheaper, you can buy a whole B+W contrast set for the price of one bay3!!  Only what is pictured is included, anything seen in the images is considered as described. Please ask any and all questions prior to bidding. Thanks!