Taper Conical Compression Spring. Ideal for a wide variety of uses in homes, the shop, on the farm or ranch, small businesses. Used in screen doors, chaise lounges, toys, lawn and garden equipment and industrial. Product Name Compression Spring Outer Diameter 5.5mm-11mm Wire Diameter 0.5mm Total Free Length(Nature State)11mm / 0.43″ Material Metal Weight20g Main ColorSilver Tone Package Content 50( /-2%)pcs x Compression Spring