uxcell Plastic Blanking End Tube Tubing Caps Cover Inserts 25mm Dia 100pcs Color: Black; Total Size: 25 x 17 mm/1" x 0.67"(Max.D*H) Material: Plastic; Net Weight: 218g Package Content: 100(+/-2%)pcs x Tube Inserts Product Name: Tube Insert Hole Size: 16 mm/0.63"(Diameter)