uxcell Plastic Office Rectangle Blanking End Cap Tube Pipe Tubing Insert 4Pcs Black Color: Black; Total Size: 40 x 20 x 15mm/1.6" x 0.8" x 0.6"(L*W*H) Material: Plastic; Net Weight: 16g Package Content: 4 x Rectangle Tube Inserts Product Name: Rectangle Tube Insert Fit for Mounting Size: 39 x 19mm/1.54" x 0.75"(L*W)