To suit 250ml beaker. Inner diameter: 67mm (approx).
Re-useable silicone beaker covers.
Helps avoid spillages and keeps contents contamination free.
Re-useable silicone beaker covers.
Autoclavable.  Can withstand temperatures up to 250°C. 
UV sterilization is not recommended as the UV light will cause the silicone to age and fade in colour over time.

Size guides are a suggestion only – beaker sizes may vary.