LABORATORY SUPPLIES AND CHEMICALS 



257 



RUBBER STOPPERS 



3746 



3746 



RUBBER, best quality; does not harden with age. Solid, or with one or 



two holes for tubes. So!d by weight only. Per ounce, 25c; per pound. .$2.50 



Unless otherwise ordered, we send solid rubber stoppers. 



RUBBER TUBING 



3748(a) 



3748(a) RUBBER TUBING, Black, pure gum, medium wall, in 12-foot lengths. 



Inside diam., in.... ]/$ fz A J4 & tys /^ 4 ?4 1 



Thickness of wall, in. 3*2 A e\ T^ A A & & */& Ji 



Per foot $0.05 .08 .10 .15 .20 .30 .50 .65 .80 1.00 



3748(b) TUBING, black, pure gum,, heavy wall, in 12-foot lengths. 



inside diameter, inches l /$ ^2 A J4 ^ Y% V* 



Thickness of wall, inches $s ^ & 3z A A J4 



Per foot $0.09 .12 .16 .23 .28 .40 .60 



3748(c) RUBBER TUBING, Black, pure gum, extra heavy wall, in 12-foot lengths. 



Inside diameter, inches ^g % ^s % % A 



Thickness of wall, inches % 3z l /% l /% -rV ^ 



Per foot $0.24 .24 .30 .40 .60 .60 



3749 RUBBER TUBING, band, pure gum, for Gooch crucibles, etc. 



Diameter, when flat, inches 1 J4 1/4 1^4 2 



Per foot $0.20 .25 .30 .40 



3750(a) RUBBER TUBING, white, medium wall, test hand made, in 12-foot lengths. 



Inside diam., in }/% & y & y% ^ f Y^ 1 



Thickness of wall, inches. &$i^8T?zt$!3i 1 /&% 



Per foot $0.05 .07 .10 .12 .15 .22 .30 .50 .60 



