No plastic does not fit into the composition of this product.
Box of 20 pieces (mixed): 10 pieces of 45 cm x 35 cm (forelegs) + 10 pieces of 45 cm x 50 cm (hind legs)
Box of 20 pieces of 45 cm x 35 cm (forelegs)
Box of 20 pieces of 45 cm x 50 cm (hind legs)
Box of 20 pieces of 45 cm x 63 cm (hocks)