1. Material: Plastic 2. I-shaped size (width x height): 4.5x5cm, 8-shaped size: 3.8x5.6cm, ellipse size: 4.4x4cm, round size: 4.3x4.3cm 3. I-shaped single weight: 1.68 g, 8-shaped single weight: 1.77 g, oval single weight: 1.69 g, round single weight: 1.76 g 4. Function: prevent bra straps from sliding down, make bra straps invisible in summer and make clothes look more beautiful 5. Operation: After putting on the bra, pass the bra strap through the hole in the middle, adjust the position of the left and right bra straps, the invisible buckle can slide up and down
