11/16(17.5mm) Black Primeline Speargun Band Rubber Latex Tubing(Select length) Color: Black, Length: (Select from size pull down menu) Manufactured by Primeline Industries, the world leading manufacturer of speargun rubber. Our volume allows us to move rubber fast and fresh. We package incoming factory fresh rubber immediately upon arrival in sealed opaque plastic to protect it from ozone and UV. Crossectional Dimensions: Outside Dia. 11/16", Inside Dia. 1/8", Wall Thickness 9/32" Manufacturers Diameter Tolerance: +/- 0.02" See "Important Information" below for latex allergy warning.