Features: The skeleton is a shelf used to wind copper coils, also known as bobbins, coil formers, and inductance shelves. It is often used in speaker frequency dividers, etc. The abs material is the hardest, and it is resistant to high temperature; Adopt environmentally friendly abs materials,it can be used for long for time. It is good toughness, not easy to break, durable. Specifications: Material:ABS Color:Beige Option Type:Type A;Type B;Type C;Type D;Type E;Type F;Type G;Type H;Type I;Type J;Type K;Type L;Type for M;Type N; Type A Size:Approx.21x6x16mm/0.83x0.24x0.63in Type B Size:Approx.22x10x18mm/0.87x3.94x0.71in Type C Size:Approx.28x12x14mm/1.1x0.47x0.55in Type D Size:Approx.30x16x15mm/1.18x0.63x0.59in Type E Size:Approx.32x15x20mm/1.26x0.59x0.79in Type F Size:Approx.38x19x16mm/1.5x0.75x0.63in Type G Size:Approx.39x15x26mm/1.54x0.59x1.02in Type H Size:Approx.36x19x20mm/1.42x0.75x0.79in Type I Size:Approx.50x20x25mm/1.97x0.79x0.98in Type J Size:Approx.60x20x32mm/2.36x0.79x1.26in Type K Size:Approx.80x29x32mm/3.15x1.14x1.26in Type L Size:Approx.95x34x47mm/3.74x1.34x1.85in Type for M Size:Approx.53x20x29mm/2.09x0.79x1.14in Type N Size:Approx.50x18x29mm/1.97x0.71x1.14in Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 10x Bobbin Wire Coil Frames