The Strex IVF Straws Rack fits the CytoSAVER Controlled-Rate Freezer chamber to hold standard 2.5–2.6 mm diameter IVF straws during programmable freezing. Available for FZ-2100/FZ-2200 (30-straw capacity, FB-2001) or FZ-3100/FZ-3200 (81-straw capacity, FB-3001), this rack supports precise, reproducible cryopreservation for reproductive and fertility research applications.