Check the listing for details. ScubaPro S-TEK Spinner Spool 100 - BCDs Technical Accessories (40.202.100). Condition: New. Listed at 74.00 USD. Evoking the distinctive design of SCUBAPRO’s classic G250 second stage, these premium spinner spools are super easy to use. The key to each spool’s user-friendliness can be found in the exclusive SCUBAPRO-branded spinner discs located at the center point of the spool; the discs remain static while the spool spins and the line plays out. Consequently, the spool will not try to rotate out of your hand like normal spools do, allowing for a more secure grip while playing out line. You can adjust the tension on the line by squeezing the spinner discs together, forming a disc brake effect. Made of durable injection-molded fiberglass reinforced nylon with a stainless steel axle and screws, the body of the spool is designed so that it can be easily clipped off to a bolt snap.