Product#: TG-3840 Availability: This item normally ships within 1 - 2 business days. Description: With manifold, this head may be used for either atmospheric or vacuum distillation.Three-way oblique bore stopcock allows taking of samples from top or bottom of sample. May be supplied with either glass or TeflonŽ stopcock on the take-off. Manifold stopcocks are glass. Available with standard taper or spherical joints.