BASIC Stockbooks - hard cover, black pages, clear strips, glassine interleaves

BASIC stockbook with black card stock pages, clear strips and glassine interleaves, and a non-padded cover. 

A5 format (6 1/2 x 9") = 32 black pages, rigid binding, 6 clear strips per page, single interleaving.
A4 format (9 x 12") = 16, 32 or 64 black pages, rigid binding (16 and 32 pages) or double-linen hinged binding (64 pages) to ensure that pages lie absolutely flat, 9 clear strips per page, double interleaves.