Designed to attach to the end of a 4" flexible hose and then press-on to any 4" diameter dust hood for a quick and easy friction fit. Ideal for use with smaller capacity, mobile dust collectors to service multiple machines. Eliminates the need to connect and disconnect a hose clamp each time a new woodworking machine is used. Stays secure and airtight

• Material thickness is 1/8"
• Large outside diameter is 4-1/4"
• Small outside diameter is 3-7/8"
• Length is 4"