Stainless Steel, Well Polished Retractors are ultimate collection of Medical Toys Rigby Rectal retractors, have two blades 5.5cm (2.25") long, 20mm (3/4") at the widest part. Each speculum features a positive setting thumb controlled adjustment from fully closed to a maximum mouth opening of nearly 10cm (4") Product dimensions 19.5 x 10 x 5.5 cm Product weight 154 gram Insertable length 5.0 cm Waterproof Yes