Features: Made of high quality PVC material and won't hurt your floor. igh toughness, bendable, not easy to break, but very strong, overall transparent. Add gear lines to help increase friction with the ground and prevent slippage. Wedge- levelers can effectively avoid furniture instability and shaking. Ribbed design helps stabilize and level an uneven toilet or furniture, Use to stabilize and level various objects. Great for leveling bookcases, tables, doors, windows, plumbing fixtures, cabinets, playhouses, sheds, deck & mailbox posts a breeze. Package Includes: 4X Table Shims Specifications: Material: PVC Size: approx 4.8x2.8x1cm/2x1.1x0.4in Type: large/small note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.