MTRJ fIber optic adapters are with polymer housing, there are two types available, one is flange type; another is SC footprint type, both Simplex. MTRJ fiber optic adapters are black color.

Shuttered Fiber Optic Adapters come with high precision zirconia alignment sleeve with a spring-loaded
plastic shutter. The shutter protects the adapter dust and debris, whilst maintaining laser
safety for the user.