OVERVIEW of four different mat series from Stu-Art... RCM Series Our RCM Series are pre-cut, non-beveled mats, cut from standard buffered matboard. The "B" (bottom) mat with its unique cut-score around the inner opening, results in a pleasing economical single mat. If you prefer a double mat we have the optional "T" (top) mat that will cover the cut-score resulting in the traditional double mat. See diagram. Both the "B" and "T" mats are available in 2 whites and 14 different colors. With the same features, ovals are available in the same selection of colors in five popular sizes. Click here for sizes, prices, and color availability. BV Series In the newly updated BV Series Stu-Art uses the latest technique in mat cutting -- computer driven -- resulting in quality beveled edge mats at lower prices, in standard and custom sizes, with price discounts starting with 12 identical custom cut mats. Inquire for mats cut from museum board, a specified mat board and color, and specialty or multiple openings. Click here for sizes, prices, and color availability. MM Double Mat Series Conservation MM Double Mat Series, are die-cut, non-beveled mats with backs, cut from 40 pt. pebbled, soft-white, solid board. Contains no groundwood, lignin or alum ... and is buffered with calcium carbonate for neutral pH permanence. Sold in packages of 5 double mats and 5 backs. Available in soft white only. Click here for sizes and prices.