Baseplate Raised 16 x 16 No Studs with Cross Opening and 4 Holes with Marbled Red, Light Bluish Gray, and Black Pattern

Reference

53588pat0001

Baseplate Raised 16 x 16 No Studs with Cross Opening and 4 Holes with Marbled Red, Light Bluish Gray, and Black Pattern (part 53588pat0001) is a LEGO element. CollectORbuild's catalog records it in 4 sets, including Lava Chamber Gate and Piraka Outpost.