Neck is tooled for a uniform fit with a #12 rubber stopper
5 gallon size is designed from Federal Specification DD-B-597
Accessories include carboy clamp and silicone stopper assemblies:
3-port platinum-cured stopper assembly and sanitary PVDF clamp to provide sterile fluid transfer with no extractables, as required in bio-tech and pharmaceutical applications
The stopper ports are designed to connect 1/8", 1/4" (4-port stopper has two 1/4" ports) and 3/8" silicone tubing