Product Name : Silicone Thermal Pad Sheet;Fit for : Package TO-3P Transistor Material : Silicone;Color : Gray Each Size : 2.6 x 2 x 0.03 cm / 1" x 0.8" x 0.01 (L x W x T);Hole Diameter : 3mm / 0.1" Weight : 13g Between electronic components such as Semiconductor, IC, CPU, MOS and heatsink. Led Lighting, LCD TV, Telecom device, Wireless Hub, Power supply etc. Cooling Modules, Thermal modules, in all applications where a metal housing is used as heatsink. Package Content : 50 (+/-2%) x Silicone Thermal Pad Sheet 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.