... 600mm.Available all kinds of connection thread, such as 1/2"BSP, 1-1/4"UNC, 5/8", PIXIE, M16, M22, M27 and ect....Available all ... /2” or 1-1/4” UNC25Rim300/450/500/1000R1/2” or 1-1/4” UNC28Rim300/450/500/1000R1/2” or 1-1/4” UNC30Rim or 3, 4300/450/500/1000R1/2” or 1-1/4” UNC32Rim or 3 ...