AATCC Multifiber test fabric # 1 precut pieces of 2 X 2 inches (5 X 5 cm) WITH 2 Overcast (Serged) Edges and 2 Heat Sealed (Fused) Edges. Six fiber (8 mm [0.33 in.] bands) containing acetate, cotton, nylon, silk, viscose and wool. Precisely cut, heat sealed & serged for use in any heavy mechanical action test such as AATCC TM 61 (3A & 4A)-Colorfastness to Laundering test done in a Laundrometer. Pack of 500 Pieces