Prime-Line Products U 9147 Shelf Support Peg, 1/4 in., Plastic Construction, Clear (Pack of 12) Used to support adjustable shelving 1/4 in. outside peg diameter x 1/2 in. seat Clear in color (Pack of 12) Plastic construction Used to support adjustable shelving 1/4 in. outside peg diameter x 1/2 in. seat Clear in color (Pack of 12) Plastic construction