uxcell Plastic Blanking End Tube Caps Cover Inserts 25mm Dia 30pcs Black Color: Black; Total Size: 25 x 17 mm/1" x 0.67"(Max.D*H) Material: Plastic; Net Weight: 66g Package Content: 30pcs x Tube Inserts Product Name: Tube Insert Hole Size: 16 mm/0.63"(Diameter)