The EUROLITE Gobo Set B 13.8/11mm is a set of gobos for use with compatible professional moving-light accessories. Each gobo has an outside diameter of 13.8 mm and an image diameter of 11 mm. The set is manufactured by Eurolite and has a listed product weight of 0.01 kg. The provided product information does not specify the gobo material, pattern count, fixture compatibility, mounting method, or gobo thickness.