This signal lamp only uses LEDs for its light source, meaning it consumes very little energy, is small and compact, and extremely durable. The lamp cover has good shock resistance, and is made of PC. It can be used as an indication pilot light accident signal or other signals in the circuits of telecommunication and electrical apparatus. Features: 1) Basic spec code: 16mm, 22mm 2) Protection grade: IP65, IP67 3) Meets international IEC947 standards 4) Meets European EN60947 standards 5) Front color: red (R), green (G), yellow (Y), white (W), blue (BL) Inner packing: 10pcs/box