Guide Rail (hollow guide rail) Features: 1. Specifications:TH3, TH3A, TH5, TH5A; 2. Type/Parameter(1):TH3(75mm*55mm*10mm); 3. Type/Parameter(2):TH5(87mm*66mm*16.4mm): 4. Type/Parameter(3):TH3A(78mm*60mm*16.4mm): 5. Type/Parameter(4):TH5A(78mm*60mm*16.4mm); 6. Passed the verification of ISO9001 quality system; 7. New technology; 8. Excellent quality; 9. Reasonable price; 10.Good reputation both at home and abroad. Wealsocan send you a range of our products for your reference if you are interested, maybe you willfind the more you need. (we also have fishplates,clips and screws.) Welcome to contact us for more details.