Rubber Sleeves For Perforated Flasks

Choose from 4 sizes:

• 121.708  3-3/8" D x 4" H
• 121.709  4" D x 4" to 6" H
• 121.711  4" D x 7" H
• 121.717  4" D x 8" H

No more messy masking tape!  These re-usable rubber sleeves allow for easy filling of your perforated flask.  They also prevent spilling during vacuuming.  Dimensions listed are for the flask that each sleeve will fit.  Fit will be easier if sleeves are moistened prior to placing over flask.  Sleeve should be removed prior to burnout.