Wobble Stopperâ„¢ Wedge fixes anything that wobbles! Stabilizes tables, shelves and other furniture. Level cabinets, fixtures and appliances. Durable, opaque polypropylene plastic for use indoors or outdoors. Each wedge measure 1-7/8" x 1-1/8" with a slant that tapers from 1/4" to 1/16". Stack them flat or at an angle to fill any gap. Interlocking ridges prevent slipping. Easy to use, not tools required. 6/pack. Made in the USA.