Beseler glassless 35mm negative holder, product number 8302. I have two (2) of these for sale. One Beseler glassless 35mm slide holder, product number 8305. I have no idea of the compatibility of these -- what enlarger they will or won't work with, as I got these with an Omega enlarger as part of a lot. Take all three for $30 plus $12 shipping within the continental US. PayPal only -- thanks.