"similar material" is a grammatically correct and usable phrase in written English.
For example, "The professor referenced similar material that had been discussed in class the previous week."
The similarity constants were determined from similar material design experiments.
The British in southern Iraq have unearthed similar material.
(Mr. Carpenter reworked similar material for "Escape fFrom L.A").
That was five years ago, but he maintains he would still perform similar material today.
But Mr. Logan had written a new scene that covered similar material visually.
(Similar material is available on three videocassettes, "As I Was Saying," from White Star).
The video also shows sections of Mencia's performances, intercut with similar material told by other funnymen.
The tires have been reinforced with similar material, and there were safety changes to the wiring.
Anyone familiar with the artist's output will have encountered much of this or similar material before.
Unlike many novels that treat similar material, this book doesn't request your sympathy so much as your gasping assent.
Similar material was handled better in The Cobra Event, where it was given the big panic treatment.
