These Pyrex® Squibb pear-shaped separatory funnels are useful as addition funnels. They have glass ST stopcocks, strong, hollow ST glass stoppers and a drip-tip with a ST ground joint. Bottom Joint is ST 24/40. For replacement glass ST stoppers, see Cat.No. 1-7650; for stopcock plugs, see Cat.No. 1-7680; for retaining clips, see Cat.No. 1-7280.