DESCRIPTION: Our Ubolts are made of 304 stainless steel, which is waterproof, rustproof and durable,antirust, moistureproof, acidresistant, wearresistant, corrosionresistant properties.This u bolts has a smooth surface without burrs. It still performs well in rainy and wet seaside conditions. We offer you M6 and M8 sizes to choose. SPECIFICATION Item Name: M6/M8 ubolts Shape: square ubolts Color: sliver Material: 304 stainless steel Size: M6 inner width 0.8/1/1.2/1.4/1.6 inches, M8 inner width 2 inches PACKAGE CONTENTS: 4sets (4 x ubolts, 4 x plates, 8 x nuts, 8 x flat washers) 1sets (1 x ubolts, 1 x plates, 2 x nuts, 2 x flat washers) NOTES: 1. The diameter of the threaded part is 1mm smaller than the inner rod after grinding. 2. Due to different displays and lights, there may be errors in colors. Please refer to the actual items.