The Gateron + Zealios + Tealios Key Switch 12-Key Tester Kit is a collection of twelve mechanical keyboard switches, each featuring a different tactile and audible response. This kit is designed to allow users to experience and compare the different key switches before committing to a full keyboard purchase. The kit contains 10 Gateron switches, 1 Zealios switches, and 1 Tealios switches, each with a different spring weight and tactile feel. Gateron switches are known for their smooth and linear feel, while Zealios switches offer a more tactile bump and Tealios switches provide a more subtle tactile feedback. The switches are mounted on a clear acrylic plate with a 1x12 layout, allowing users to easily press each switch and compare their individual tactile and audible properties. The plate is also designed to fit easily into a standard keycap set, making it easy to swap out and test different keycaps on each switch. Overall, the Gateron + Zealios + Tealios Key Switch 12-Key Tester Kit is an excellent tool for anyone looking to build a custom mechanical keyboard or simply to explore the different options available in the market. It provides a tactile and audible reference point for each switch type, allowing users to make informed decisions when selecting switches for their keyboards.