uxcell Plastic Round Table Chair Leg Feet Tube Pipe Insert Blanking End Cap 16mm Dia 30pcs Black Color: Black; Total Size: 16 x 18mm/0.63" x 0.7"(D*H) Material: Plastic; Net Weight: 34g Package Content: 30 x Round Tube Insert; Product Name: Round Tube Insert Thread Diameter: 15mm/0.6"; Bottom Diameter: 10mm/0.4" Hole Diameter: 8mm/0.3"