Feature: 1. [SELF LOCKING] These rotary switches have a 3 levels self locking function, with high reliability, convenient and practical. 2. [SILVER CONTACTS] The contacts are made of silver, which has good contact performance and good electrical conductivity. 3. [FLAME RETARDANT] Use flame retardant material shell, with high and low temperature resistance, safe and stable operation. 4. [25PCS IN 1 SET] Including 25pcs self locking knob switches, sufficient in quantity, easy to install and use. 5. [MULTIPLE USAGES] Round knob switches are widely used in machine tools, textile equipment, light industrial equipment, etc. Specification: Item Type: Knob Switch Model: BEM-LA16-22XD/31-Y-R Mounting Hole Size: Approx. 16mm / 0.6in Connection Method: Soldering Feet Mode of Operation: Open Bulb Color: Red Gear Position: 3 Gears Operation Function: Self Locking Contact Form: 2 Normally Open 2 Normally Closed Contact Material: Silver Contact Rated Insulation Voltage: 250V. Package List: 25 x Knob Switch25 x Sealing Ring Note: Due to the shooting lighting, there will be some chromatic aberration, please refer to the actual product.