Description: Heavy duty freediving buoy training safety float with inside inflatable bladder, lightweight, wear-resistant, durable and portable High visibility surface marker buoy makes sure scuba divers and freedivers can be seen in open ocean Large opening on the top with zipper and loop tape fastener closure, the compartment can be used for storage of dive flag, pole, line, reel and other necessities Attached with 5 stainless steel D-ring on the bottom and around the buoy to connect the freediving line With over pressure relief valve and oral inflator, can use standard BCD or just by your mouth to inflate 4 Loop handles around the buoy for pre-dive preparation, bottom mesh design for water drainage Designed with dive flag pole holder hole Great for instructor, freediving, scuba diving, beach diving, snorkeling, spearfishing and more Specification: Material: TPU coated nylon Diameter: Approx. 75 cm/29.5 inch Size after inflated (D x H): Approx. 75 x 22 cm/29.5 x 8.7 inch Color: Blue Package Includes: 1 Piece Freediving Buoy Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!