| 1 | Compact, light-duty blind | 25 mm | Small windows and lighter zebra fabric | A compact clutch may suit a smaller tube and limited fabric load. | Confirm the clutch insert, tube wall thickness, bracket fit, and system-rated blind size. |
| 2 | Compact blind with frequent operation | 25 mm | Small rooms or windows operated regularly | Prioritize smooth chain movement and secure clutch engagement; frequent use does not change the tube’s rated capacity. | Check chain size, chain connector, end plug, and compatibility with the specified tube. |
| 3 | Light-duty blind with wider fabric | 25 mm or 28 mm | Wider openings using relatively light fabric | A wider span can increase tube deflection; a 28 mm system may offer a more suitable platform, subject to its rated limits. | Ask for the system’s maximum width and load guidance; assess tube stiffness and support spacing. |
| 4 | General-purpose manual blind | 28 mm | Everyday residential zebra blinds | Often selected as a middle-size system where a compact tube is not the preferred fit. | Verify clutch-to-tube fit, bracket dimensions, fabric weight, and the complete system rating. |
| 5 | Medium-width blind with heavier fabric | 28 mm | Medium openings or fabric with greater mass | Select a clutch rated for the actual blind load; tube diameter alone does not establish lifting capacity. | Provide fabric weight, finished width and drop, and hem-bar details when requesting a rating. |
| 6 | Blind requiring a larger tube system | 38 mm | Larger openings where the selected system calls for a larger roller tube | Use a clutch and brackets designed for the 38 mm tube; do not assume smaller-tube components will fit. | Confirm tube profile, wall thickness, drive insert, end plug, and bracket compatibility. |
| 7 | Large or heavier blind, manual operation | 38 mm | Applications with greater fabric load, when approved by the system specification | Match clutch capacity to the calculated load and operating requirements; a larger tube does not guarantee a higher-rated clutch. | Obtain the manufacturer’s load and size limits for the exact clutch, tube, and bracket combination. |
| 8 | Motorized blind configuration | 25 mm, 28 mm, or 38 mm, depending on the motor system | Automation-ready zebra blinds | Choose the tube, motor, crown, drive adapter, and brackets as a compatible system. | Check motor dimensions, torque rating, tube adaptor, power arrangement, and available installation space. |
| 9 | Replacement clutch for an existing blind | Match the existing tube diameter and profile | Repair or maintenance of an installed system | A nominal diameter match may not be enough if the clutch drive, tube profile, or end fitting differs. | Measure the tube outside diameter and inspect the drive interface, chain, brackets, and end plug. |
| 10 | Selection where tube size is not yet fixed | Compare 25 mm, 28 mm, and 38 mm systems | New projects with multiple window sizes or fabric options | Choose by complete-system limits and fit rather than diameter alone; larger tubes may require more installation space. | Compare rated size and load, tube deflection guidance, bracket clearance, and component availability. |