These nozzles fit into a Swivel Nozzle Clamp and are made to the shortest length to still give coherent flow. Width x aperture is 1.13” x 0.05” for 1/2” tube version only. Nozzles come with captive nut to fit a special Cool-Grind Swivel Nozzle Clamp. Make sure you order a swivel clamp in addition. Length including ball is 3.5”.