Flask insert type H 135.501 , for 1000 ml round bottom flasks, 1 unit(s)Flask insert type H 135. 501 , for 1000 ml round bottom flasks Material: aluminium. To use the flask insert, either a type H 135. 50 2000 ml flask holder without handle or a type H 135. 51 2000 ml flask holder with handle is required. Technical Information Type H 135. 501 Suitable for 1000 ml round bottom flasks Operating temperature max. 300 C Vol. 1000 ml external 171 mm internal 134. 5 mm Inner depth 52. 8 mm Weight 1324 g