Polyester Blend Imported OLYMPIC STORAGE: Fits all Olympic-sized barbells for safe and convenient storage. PROTECTIVE COATING: Impact-resistant coating keeps your barbells scratch and scuff-free. EASY ADD-ON: Fast, quick, and easy installation makes this a convenient feature upgrade to your power rack. STANDARDIZED FIT: Compatible with Sunny Health & Fitness Power Zone Power Cages (SF-XF9925, SF-XF9931, SF-XF9933, and SF-XF920063). The SF-XFA003 Bar Holder Attachment is compatible with the following add ons: SF-XF920020, SF-XF920063, SF-XF921024, SF-XF921041, SF-XF922059, SF-XF9925, SF-XF9931, SF-XF9933