NALGENE® 3645 Self-Zeroing Buret Kit, 1000mL low density polyethylene bottle; four feet of clear PVC plastic tubing; polypropylene fill-tube and adapter

Makes any plastic or glass 25 or 50mL buret self-zeroing, economically and easily. Saves you money over costly glass self-zeroing burets. No more funneling; hazardous, wasteful spills are eliminated. Can be used with almost all aqueous titrants. Set adjustable fill-tube to zero mark on buret. Squeeze bottle to fill buret just above zero mark. Release and excess liquid returns to bottle and titrant falls to the zero mark. To switch to a different size buret, simple reverse the adapter. Extra closure without tubing hole is included for storing titrants or carrying to the field.