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 SwitchModel: BEM-LA16-22XD/31-Y-RMounting Hole Size: Approx. 16mm / 0.6inConnection Method: Soldering FeetMode of Operation: OpenBulb Color: RedGear Position: 3 GearsOperation Function: Self LockingContact Form: 2 Normally Open 2 Normally ClosedContact Material: Silver ContactRated Insulation Voltage: 250V.Package List:25 x Knob Switch25 x Sealing RingNote:Due to the shooting lighting, there will be some chromatic aberration, please refer to the actual product.