Compact Designed Copper Coils are offered in soft annealed and single or double layered type construction that ensures long lasting usage. These Copper Coils are available in plain and plastic coated finish. Compact Designed Copper Coils feature light, clean and dry internal and external surface. Compact Designed Copper Coils are made with an outside diameter tolerance of +0.0/-0.08mm, annealed at approximately 600 Degree C, giving a hardness range of 45/60 HV5.