When you add switches and keycaps,the switch tester provide a more accurate test environment and truer feel. Pls pay attentions: Switches Tester only, Tester includes blank keycap+Base+Switch Choc Switch, Jade, clicky, 50gf, stronger bump Choc Switch, Navy, clicky, 60gf, stronger bump Choc Red Pro, Linear, 35gf Choc Pink, Linear, 20gf Choc Silver, Linear, 40gf Choc Crystal Red, Linear, 35gf Choc Robin, clicky, gold plated spring, 60gf Choc Blue, Linear, 20g Kailh Low Profile Choc Dark Yellow - Linear | 70g Kailh Low Profile Choc Burnt Orange - Tactile | 70g Kailh Low Profile Choc Pale Blue - Clicky | 70g Red - Linear / 50g Operating Force Brown - Tactile / 50g Operating Force White - Clicky / 50g Operating Force Colour:As Shown Material:Acrylic Package Contents: 1 * Axle body tester Only the above package content, other products are not included. Note: Light reflection 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.