I'm sorry, I don't have enough information to provide details. I only know that these are Gateron Silver key switches. If you need more information, please let me know and I can provide additional images, etc. Black keycaps with translucent legends on the bottom row are also included. These are not available for individual sale. Thank you for your understanding. These are Gateron G Pro 3.0 Silver linear switches. 35 pieces x 3 sets. - Product Name: Keyboard Switch (35 pieces) - Model Name: Gateron G Pro 3.0 Silver - Switch Type: Linear - Weight: 45g - Spring: 22 mm - Factory Lube: Pre-lubed Customizable keyboard switches made by GATERON. - Brand: GATERON - Product Name: Keyboard Switch - Model: KS-3X - Country of Manufacture: China Thank you for viewing.