6oz air sealant gun. The Semco model 250 sealant gun is designed for the quiet, pneumatic application of sealants, adhesives, potting compounds, and other materials packaged in Semco disposable cartridges. The gun is made of metal and plastic and is engineered to withstand the rigors of the production work place. The nickel plated retainer is affixed to the valve assembly via a secure bayonet lock feature, permitting easy replacement of cartridges. The handle can be removed to allow more clearance and better manipulation in confined areas. Note: The air hoses required to operate Semco air sealant guns are sold separately. 2 lbs (1Kg) shipping weight.