1、The product shell is made of PC flame retardant material, which is safer to use. 2、The product adopts modular design, and its use and maintenance are very simple. 3、The product is made of precise electronic components, with longer service life and more stable performance. 4、This product adopts 2P guide rail installation, installation is very simple. 5、Installation with standard 36MM guide rail and use with circuit breaker in distribution box Features: The product shell is made of PC flame retardant material, which is safer to use. The product adopts modular design, and its use and maintenance are very simple. The product is made of precise electronic components, with longer service life and more stable performance. Purple copper fittings, electrical conductivity is good. This product adopts 2P guide rail installation, installation is very simple. Installation with standard 36MM guide rail and use with circuit breaker in distribution box Specification: Material: PC flame retardant shell Uc: 1000V Type: #1, 10/20KA;   #2, 20/40KA(Optional) Nominal discharge current: 10KA(#1),20KA(#2) Maximum discharge current: 20KA(#1), 40KA(#2) Installation mode: 2P Guide rail mounting Residual voltage after unloading voltage: <3.0KV Rated connectivity and segmentation Ability: 1M Product dimension: 90*49*36mm / 3.5*1.9*1.4in Weight: 260g/9.2oz Package List: 1 * Surge Protective Device Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.