Laboratory Grade Rubber Stopper, Black SBR Rubber, Size #1, 19 x 14 x 25mm, 52 per Package, 52PK, United Scientific, Mfr#: 259150-1

Laboratory Grade Rubber Stoppers offered in a wide range of common sizes for most laboratory applications. Available standard black SBR rubber. Solid rubber stoppers are molded according to standard industry size specification. Packaged in approximately one pound packages.
Shipping Weight: 2.2 lbs
Shipping Dimensions: 5.00 x 8.00 x 1.50
Research or further manufacturing use only, not for food or drug use.