ITEM NAME:1000 Pcs Silicon Thermal Heatsink Insulator Pads for TO-220 Transistor A3K6 1000 Pcs Silicon Thermal Heatsink Insulator Pads for TO-220 Transistor A3K6 Product Name : Insulator Pads Material : Silicon Fit for : TO-220Transistor Size : 13 x 18 x 0.3mm(L x W) Hole Dia : 3.5mm Color : Light Blue Weight : 130g Package Content : 1000 (+/-2%) x Insulator Pads Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.