Sizes are colour coded • Size 0 - neonate, blue seal, 15M x 40 • Size 2 - paediatric, white seal, no hook ring, 22F x 25 • Size 3 - small adult, yellow seal, no hook ring, 22F x 35 • Size 4 - adult, green seal, no hook ring, 22F x 35 25% Discount Start from: £19.97 Neonatal, Paediatric, Small Adult & Medium Adult