PYREX® Closures, for Delong Neck Culture Flasks, Anodised Aluminium, 10 Pack

Manufactured from either polypropylene or anodised aluminium, Suitable for use with the PYREX® culture flasks with the plain Delong necks, The polypropylene closure is a two position cap - open for gaseous exchange or closed for humid environments, Both closures can be autoclaved