CE-Force sticky mat frame features a durable aluminum/polysytrene construction, offering more strength than traditional plastic frames. The non-skid bottom fiurmly holds the frame on a variety of floor surfances. Frame is suitable to use with the following size mats: 18 x 36, 18 x 45, 24 x 36, 26 x 45, 36 x 36, and 36 x 60. Packed: 1 Frame per Case