Mesh objects are separate and gas tap can be rotated.
OBJ,FBX.3DS,STL,PLY and DAE
1 Texture set with Metal/Rough PBR maps in 4k & 2k resolution for (blue, red, yellow, green, rusty & dirty)
Metal/Rough textures maps are used and rendered in Marmoset toolbag 3
13 Unity maps : (Standard/metallic) : - Albedo Transparency, Metallic/Smoothness, Normal (open GL)Opacity & AO for (red, blue, green, yellow, black, rusty & dirty) in 4K
13 Unreal maps: Albedo, AO/Roughness/Metallic, Normal & Opacity for (red, blue, green, yellow, black, rusty & dirty) in 4K.
Note: 4k & 2k textures are both available for metal/rough texture maps while for Unity & Unreal only 4K is available so the maximum amount of detail can be seen.However , If you don't need such large texture just re-scale them to an appropriate size in powers of 2 (2048 x 2048, 1024 x 1024, 512 x 512, etc...) keep the aspect ratio the same to avoid any weird stretching.
General:Hope you enjoy it and wish you a happy renderings and success with your project.