Highly visible safety yellow wheel chocks are connected with nylon rope. Made of durable, lightweight recycled polymers. Guaranteed not to crumble, rot or deteriorate. Oil and chemical resistant. Each chock is 9 1/2in.L x 6in.W x 4in.H. U.S.A. Dimensions W x D x H (in.): 6 x 9 1/2 x 4, Material: Yellow recycled polymers, Includes (qty.): 1