... 4: Several dimensions available Picture of Goods:1, FC/PC SM Simplex, ceramic sleeve, metal housing, red color ... dust cap (1 piece type) 2, FC/PC SM Simplex, ceramic sleeve, metal housing, red color ... dust cap (2 piece type) 3, FC/PC SM Simplex, ceramic sleeve, metal housing, red color ... dust cap (Big D type) 4, FC/PC SM Simplex, ceramic sleeve, metal housing, red color ...