Chewy Tubes, P''s and Q''s (Pack of 2)Solid, non-toxic exercisers for practicing biting and chewing skills. P''s and Q''s are made of the same FDA compliant material as Chewy Tubes® , but are solid rather than tubular, offering a firmer surface for biting. Sold in sets. Safe and non-toxic. Latex free. This is an hygiene product and cannot be returned. Product photo may not exactly match the product offered for sale. Please refer to the product description.