Bel-Art Clavies Autoclave Safe Bag Clips (Pack of 100) (F13190-0100) Clips can be opened and closed with one hand to easily and securely close the gathered top of an autoclave bag after it has been filled with wastes Stiff plastic design holds the bag neck closed while allowing release of internal pressure that can develop during the autoclave cycle After autoclaving, the clip is left on the bag for final disposal; closed internal dimension is 7/16" Suitable for bench-top sized bags or small autoclave bags ranging in size from 12" x 24" to 19" x 23"