For sale Tube Length (mm): 100 Tube Internal Diameter (mm): 40 (ring thickness ø5) Base Ring Internal Diameter (mm): 45(standard size) Base Ring Shape: Round Space between base ring and tube (mm): 8 Locking System: No Escape Standard with padlock Head Choice: Double Floor Head Bars space: Standard space (about every 10mm) Make an offer I can't refuse. Possible to send to European country (shipping cost for buyer)